How to remove damp smell from heavy mattress during monsoon

The smell that comes from your mattress when you lay down at night and pull back the sheet is a flat, smelly, somewhat moist smell that didn’t exist in April.

Two monsoons ago, i had a 6-inch memory foam mattress that must have weighed close to 30 kgs. that smell had already thoroughly soaked into the foam by the time I noticed it, and you can’t really carry something like that outdoors every time it rains.

It took me many tries to get rid of it. Some of the things I tried didn’t work. in fact, a few things made it worse. however, I did find a strategy that works, and I want to guide you through the entire process. not simply “sprinkle baking soda and hope,” but how to remove damp smell from a heavy mattress during monsoon under a thick mattress and prevent it from returning every time it rains for the next four months.

I’ll cover:

• Why heavy mattresses hold monsoon smell worse than thin ones
• What you actually need before you start (most of it you already own)
• The full cleaning process, step by step
• How to dry a mattress properly indoors when the sun isn’t cooperating
• What to do if the smell keeps returning
• A few habits that stopped this from happening to me again

Let’s get into it.

Why your mattress smells in the first place?

It’s helpful to understand what’s really happening before you touch a single cleaning product.

Like a shirt, a mattress is dirty, but it doesn’t smell. because moisture gets trapped within, it smells. this moisture comes from both your body and you sweat a bit as you sleep each night and the wet air surrounding you.

There is nowhere for the moisture to escape when it absorbs into the layers of cotton or foam. In most Indian houses, the monsoon air is extremely humid, often in excess of 70%, and water simply does not dry off on its own at that level as it remains there and sour smell is caused by the easy growth of bacteria and mild mold in that type of warm, moist environment.

Knowing this is important since it indicates that the smell isn’t limited to the mattress and it’s within. because of this, scented powders and surface sprays only mask the odor for a day or two before it reappears.

What you’ll need:

You don’t need anything fancy for this. here’s what I used:

• Baking soda (a full box, not a small pinch, for a queen mattress you’ll use most of it)
• White vinegar
• A spray bottle
• A vacuum cleaner with an fabric attachment
• A stiff-bristled brush (an old toothbrush works fine for the edges and seams)
• A couple of large bath towels
• A room fan or two, or a table fan you can point at the bed

Purchasing a mattress protector for later is also beneficial if your mattress has been smelling like this for some time. near the last section, I’ll explain why.

How to remove damp smell from a heavy mattress during monsoon – Step by step guide

Step 1: Vacuum the mattress first

Many people feel that baking soda “didn’t work” for them because this step is frequently neglected.

Remove everything from the bed, including the mattress protector and sheets, and use the fabric attachment to gently vacuum the entire surface. Review it several times. because dust, dead skin, and moisture tend to collect at the seams, edges, and any stitched areas, pay close attention to these areas.

The smell is still present after this step. it simply clears the surface so that loose dust doesn’t obstruct the next step’s ability to reach the layers below it.

Step 2: Baking Soda and Vinegar Treatment

The actual job is done in two rounds, one with baking soda and the other using a vinegar wash.

First, apply a thick coating of it to the whole mattress. you want it completely coated, especially over the area where the smell is highest, so don’t be nervous. this white powder works wonders in removing smells and trapped moisture from soft materials like cotton and foam. give it a minimum of four to six hours to sit. If you have another bed or a sofa to sleep on for a single night, overnight is much more effective.

Next, lightly apply some vinegar and water. In your spray container, combine equal amounts of both. after the baking soda has had time, gently (not wet) spray it on, focusing on the places that smell the worst. where the two meet, you’ll most likely hear a soft vibrating sound. In fact, that process aids in removing deposits and microorganisms from within the cloth. after letting it rest for an additional hour, vacuum the entire mattress once more to get rid of the residue and anything it removed.

Don’t ignore the last cleaning. over time, leftover baking soda might actually draw in additional moisture, which adds to the same issue you’re trying to solve.

Step 3: Dry it completely

This is the most important section and the one that most people jump at. smell cannot be permanently removed by cleaning the mattress as it’s drying it correctly.

The residual moisture will restart the entire smell cycle in a few days if the mattress is placed back on the bed, even if it is just slightly damp.

During the monsoon, you can’t really leave a heavy mattress outside in the sun, so either place it at an angle with a chair or set it up against a wall to allow air to flow both above and below it, not just over the top. you should directly aim one or two fans at it, then leave them going for a few hours (I ran mine for the most of a day). although it’s not required, having a dehumidifier in the space also helps.

Before returning the mattress to the bed, place your hand flat on several areas of it. you should give it additional time if any area still looks a little moist or cooler than the others. you really shouldn’t hurry this one step.

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What to do if the smell keeps coming back?

Even after performing all of this, smell occasionally reappears, which often indicates one of two problems.

The first is that the wetness has reached below the top few inches. this is typical of older memory foam mattresses that have collected moisture and perspiration over several monsoon seasons. in that scenario, a professional mattress cleaning service that utilizes hot steam or a portable UV mattress sanitizer can reach layers that a home treatment just cannot.

Mold is not just bacteria, is the second possibility. this typically manifests as tiny, dark or greenish patches rather than just an unpleasant odor. home remedies won’t work if you see real mold growth. at that point, it’s worth consulting a professional because mold that has grown deeply into the foam may indicate that the mattress is nearing the end of its useful life.

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How to stop this from happening every monsoon?

It’s one thing to fix the smell once and it’s a different issue if you don’t deal with it every year, and it boils down to a few basic habits.

You should invest in a mattress protector that is breathable and waterproof and choose one with a breathable layer rather than the thick plastic type that traps heat and increases perspiration and this is the biggest adjustment that i’ve made, and it’s the primary reason I haven’t experienced this again.

Well, not just the mattress, but the entire room should be exposed to fresh air. when the rain stops, open the windows for even 15 to 20 minutes each day. nevertheless, half of the issue is the room’s blocked air.

A moisture absorber should be kept close to the bed and under the bed frame, a straightforward silica gel box or moisture-absorbing pouch can removes excess moisture from the air before it can seep into the mattress.

During the monsoon season, flip or rotate your mattress once a month. this promotes uniform mattress wear by preventing moisture from concentrating in one area.

You must avoid making the bed as soon as you get up. before putting it back under the covers, let the sheet be pulled back for 15 to 20 minutes to allow any moisture from your body from the previous night to dry out.

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