Cleaning a Fiberglass Tub

November 5, 2003

Woman Cleaning BathtubMy fiberglass bathtub has a nonskid bottom that is terribly difficult to get clean. I have found that the best thing is to scrub it with baking soda. It also seems to stay clean for a long time after I do this. For a little added cleaning power, after it is all scrubbed, I add and scrub a little dash of vinegar all around, scrubbing quickly as the fizzing action only lasts a few seconds. The tub is just gleaming when I get done. It is an amazing cleaner for fiberglass.


Patti from Oklahoma City, OK



March 23, 20163 found this helpful
Top Comment

Sorry, but baking soda does not really clean anything that is dirty. Sure, it may "clean" something that's already clean, but it will not clean a dirty shower or bath tub.

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31 Questions

Here are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community.

October 23, 2015

I have tried many things to get the soap scum off my fiber glass tub, but to no avail, nothing has worked. Is there any sure way to clean it? Thanks.


November 16, 20153 found this helpful
Best Answer

use pam , spray on ,wait a few minutes and wipe off . be sure to clean with vinegar afterwards to get off the slippery oil

June 1, 20161 found this helpful
Best Answer

Thank you Cathy, this is AMAZING and I've tried it all. You are Fantastic...I can't imagine where you found this trick, but it works like a charm.


Thanks so much for sharing it, this must be a well kept secret, and I feel very lucky to have seen it.

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April 20, 2010

Mom always put her plants in her fiberglass tub to water them. Then she had an unexpected illness and left the plant in the tub, which created a stain that won't come out. Help please.

By laura from Lathrop, MO


April 29, 20161 found this helpful
Best Answer

Easy off Fume free blue cans only.

November 22, 20165 found this helpful
Best Answer

I've had a cleaning business for over 30 years. This absolutely works. However...use on fiberglass ONLY. Do NOT use on enamel tub because it will remove the paint.

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February 26, 2011

Is there a sure fire cleaning tip for cleaning a fiberglass tub and shower surround?
I have tried Magic Eraser, Kaboom, Scrubbing Bubbles, etc.

By Lorraine from CT


February 28, 20110 found this helpful
Best Answer

I have tried just about everything listed here and I will admit the oven cleaner really does work, but something that works astonishing well is a product called EdFred shower stall and tile cleaner. My husband found it at Orchard Supply Hardware store.


I thought for sure we would have to replace our entire shower stall but this stuff made it brand new! Also their toilet bowl cleaner also works amazing too.

April 12, 20112 found this helpful
Best Answer

I just moved into an apartment with a retro green tub and shower surround. I'm not sure when the last time it was actually clean but it was gross. I mean soap scum and dark grey gunk. Yuck. It was the only big negative of the apt. So today I was reading the suggestions for cleaning and decided to give the oven cleaner and majic eraser a try. OMG!!! It worked great and I didn't even have to scrub it til my arm fell off. Amazing. I'm super happy. I don't mind the "retro" green as long as it is clean....

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September 9, 2011

What is best way to clean a fiberglass tub? I purchased a house and the tub is very dirty. It is a one piece tub and shower

By Gail


December 6, 20160 found this helpful
Best Answer

I used 600 grit, then 800 grit followed by 1000 grit wet sandpaper. I then used a polishing compound to finish off the job. The tub looks brand new now. The sand paper did not harm my tub. So, whom ever is saying not to use abrasives on fiberglass are 'not in the know'.


Oh, it took about 4 hours of hard labor. Not fun, but I got some great exercise.

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April 13, 2017

On your site it says you can clean fiberglass bathtubs with alcohol. What kind are you talking about grain alcohol or rubbing alcohol?


Diamond Post Medal for All Time! 1,246 Posts
April 14, 20170 found this helpful

I dilute rubbing alcohol 50/50

April 16, 20180 found this helpful

cheap vodka at also cleans stainless steel and my eye glasses ...perfect....

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July 5, 2016

My fiberglass tub has some yellow spots. How can I get rid of them?


May 30, 20170 found this helpful
Best Answer

Try Greased Lightening and a magic eraser. It works on a lot of things.

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March 16, 2013

I have a friend that has hard black specks in her tub, almost like ink spots. At first I thought it was mold that was building up inside the jets of her jacuzzi tub, so I used a cup of bleach and a cup of dishwasher detergent powder, filled up the tub and ran it through the jets for about 20 minutes. That did nothing to the spots. We cannot seem to get them out unless we scrub and scrub, but we also don't want to ruin the surface because it is fiberglass.

Every time she bathes there are more, now they just keep building up. She said she can get them out if she uses her nail then her finger to scrub each individual speck, but then there is a smudge left and we need to scrub and scrub to get that out. We cannot figure out what it is or how to stop it. They aren't grease or mildew spots because they are very hard.


We are getting exhausted with this problem and now there must be a couple hundred little spots. I have noticed there is also some in the toilet in the same bathroom that are very difficult to remove too. There are 3 other bathrooms in the house, but they don't have that problem. (The specks are in the master bathroom.)

By Carol N.


December 23, 20190 found this helpful

As strange as it may sound, I discovered small black spots left in my shower was mascara residue. I now make sure I remove my mascara completely before getting into my shower or tub.

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June 20, 2013

This is a great place to come for help. I've read numerous tips on how to clean a shower, but have never seen a tip on how to clean a fiberglass tub. I need help. Can I use the same tips given for tile on fiberglass tubs?

By Andria

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ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.

April 1, 2009

We have a fiberglass shower and bathtub installed in our home. The bathtub's still in very good condition.


September 19, 2007

I have a fiberglass tub (or as I call it, a plastic tub) and I can not get it white.

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