best way to clean fiberglass tub
Kristina Davis

Looking for the best way to clean fiberglass tub? Are you tired of finding yourself relaxing in your tub just to notice ugly and nasty stains that totally ruin and put off your whole mood? If you are, then there’s no need to look far because we surely got you covered!

We all know and understand how vital “relaxation” and “leisure” time are, especially for those who struggle with work, manage businesses, and maintain the house.

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Relaxation time is every person’s safe haven since it helps them think about their day and reflect on what they have done.

People usually spend this time in their bathroom with some lit vanilla candles and rose petals. However, what happens when your tub is horribly dirty?

In this article, we will talk about the best way you can clean your fiberglass tub and some bonus method along the process, so go forth and read on!

What Happens When You Don’t Clean Your Tub?

Before we head on to the guide, let’s first talk about the three main things that happen when you don’t take the time and effort to clean your bath to boost your motivation and get you scrubbing!

Mold and Mildew May Grow in Your Tub

No one ever likes mildew and mold, but if you don’t get your bath cleaned every week, you’re sure to find these nasty things sticking on your tub.

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Mold fungi are tiny, so you practically have billions and billions of spores around if you see the black color germ.

Your Wounds May Get Infected

Your bath is actually among the filthiest places in your house. Reports say that your bath is contaminated with over 1,000 germs per square inch.

Considering this, always ensure that you thoroughly clean and disinfect your tub, especially when you have cuts or wounds.

You certainly don’t want something from the tub of your bathroom to get inside your wounds and infect them.

Build Up of Soap Scum

Whenever it comes to washing our bodies, soap can be called our mates, but if you do not properly rinse and clean your tub after bathing, it may trigger a film on your bath’s walls and bathroom curtain.

Fiberglass typically grow soap scum, which may breed Serratia marcescens (that colored pink bacteria you sometimes see)

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Best Way to Clean Fiberglass Tub

best way to clean tub

Now that you know why you should give your effort and time in cleaning your bath, It’s time to talk about the proper ways to clean it.

Method 1: The Safe and Effective Way to Clean Fiberglass Tub

There are countless ways to clean your bath, but we present the safest and effective method to sanitize it and ensure its protection and durability.

Things You’ll Need

  • Mild cleaning solution
  • Sponge that is non-abrasive
  • Microfiber Towel
Steps to Perform:

1. Choose a Mild Cleaning Solution or Create One

For cleaning, you may fill in a bucket of warm water and add in your chosen cleaning solution (we suggest mild ones such as all-purpose cleaners, liquid detergents, and bathroom cleaners) to avoid causing damage to your fiberglass bath.

If you don’t have a cleaning solution on hand, you can also create one by mixing 2 tbsp baking soda, ½ cup white vinegar, 10 drops of lemon essential oil, and 1 cup of water.

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2. Apply Your Chosen Solution

Once your solution is ready, grab a non-abrasive sponge and dunk it into the bucket of solution.

3. Thoroughly Rinse Your Fiberglass

After checking if you’ve covered all the bath’s area with the cleaning solution, let it sit for an hour before rinsing.

Once an hour has passed, you may now rinse off any foamy soap on your tub. Thoroughly dry it by wiping the bath with a microfiber cloth right after.

If you don’t have a sponge, ensure the applicator you are using is made of polyurethane or polyester.

Gently do some scrubbing on the surface of your fiberglass tub. Ensure that you can cover all the bath’s sides. Include your faucet and faucet switch as well.

Method 2:  How to Clean Fiberglass Tub with Oven Cleaner

Our bath isn’t exactly easy and fast to replace, so a lot of us opt to stick with the ancient and stained model. When regular or natural cleaning solutions fail to get all that nasty dirt out, give a can of oven cleaner a try to eliminate those unwanted germs. Read on below to know how to clean fiberglass with oven cleaner!

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Things You’ll Need:

  • Oven cleaner
  • Soft sponge or damp cloth
  • Dry towel
  • Warm Water

 1. Apply the Oven Cleaner

Before you begin, open your windows to ventilate the bathroom. Grab your oven cleaner and apply it to the surface of your fiberglass bath.

2. Cover All the Area

Start at the tub’s bottom part and work your way up to the sides. Don’t apply the oven cleaner to any metal trim, as this can damage the material. Let the oven cleaner stay on the fiberglass tub for about an hour.

3. Wipe off the Oven Cleaner With a Damp Cloth

Once an hour has passed, Wipe the oven cleaner off the fiberglass bath using a damp cloth,

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Make sure you thoroughly wipe off the solution to avoid any residue.

4. Wash and Rinse the Tub

Use clean and warm water to rinse off the bath. Ensure that you can wash the bath’s side as well as the bottom.

After doing so, dry it properly with a towel.

How to Remove Tough Stains from Fiberglass Tub

how to remove tough stains from fiberglass tub

Frequent usage of your tub without general cleaning can lead to stains on your bathroom surfaces, but most cases seem to be easy to handle. However, as for fiberglass tubs, it can be hard to clean out the stains due to their sensitivity.

We have gathered four methods you can try on how to remove tough stains from fiberglass tub:

1. Utilize Hydrogen Peroxide

Deep and dark stains can be challenging to eliminate with ordinary cleaning solutions, but you may use hydrogen peroxide for these stains. Put some layers of white clean cloths over the area with the stains and pour the hydrogen peroxide on top.

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Let the solution soak in and stay overnight. In the morning, wash and dry the area.

2. Use Baking Soda

Baking soda is a great and handy natural product since you can use it for almost anything! When dealing with stubborn stains, prepare a solution by combining baking soda and warm water to make a paste.

Dab this paste on the places with stains and soap scum. Let this sit for 2-3 hours and rinse it off with warm water.

3. Utilize Vinegar

Acid is an excellent way to remove those stains that ordinary cleaning products can’t. You may use vinegar to do so.

Drench a cloth with vinegar, apply it to the area and let it stay for up to an hour. After taking off the fabric, clean the area with warm water.

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4. Remove using Acetone

You can eliminate hard stains with acetone. Apply the solution to a white clean towel and gently rub the stained area until it entirely fades.

Ensure that this kind of solution is used seldom to avoid damaging your bath.


Now that you know the proper and best way to clean fiberglass tub, you can reward yourself by lighting up some scented candles while soaking in your newly cleaned tub, relaxing to your heart’s content.

Cleaning can be a tiring job, but it is also worth your effort and time since this helps you physically and mentally. With the proper guide, the process can be less stressful and difficult, so be sure to keep this article whenever you decide it’s time to clean your loved tub again!

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