Cleaning an acrylic bathtub is easy as long as you use the right products. Acrylic scratches easy, so it is not a good idea to use a scouring pad or hard brush. Chemical cleaners with solvents can damage the acrylic, eventually causing it to crack. To safely clean it, follow these steps.
Step 1 - Preparation
Remove everything from your tub, such as shampoo bottles and soap, wiping off the bottoms to remove any soap scum. Now is a good time to clean items that you use in your tub. If you have a loofah or shower sponge, place them in your sink in warm water with a little shampoo or dish liquid.
Step 2 - Cleaning the Inside
To clean the inside of the acrylic bathtub, fill it with warm water and add 3 or 4 squirts of dish liquid. Allow it to sit for 30 minutes. Let the tub drain and use your sponge to wipe away the residue. If you notice that you still have some stubborn spots that did not lift during the soak, pour some baking soda on the sponge and rub gently in a circular motion. This step may need to be repeated several times. Rinse the surface well.
Step 3 - Clean the Outside
You may have some stains from products with dyes, such as bubble bath or shampoo. Use the sponge again with baking soda to lift them. Rinse and wipe the entire surface with dish liquid applied on a wet sponge. Then use the toothbrush to scrub around the fixtures, along the wall, and in the corners. If there is soap scum, spray all-purpose cleaner to loosen it. If it has been a while since it has been scrubbed well, it may take some elbow grease. Rinse again, and dry the surface with a cloth.
Step 4 - Polish
Polishing your tub will restore the shine it had when it was brand new. Car polish will withstand the water and make future cleaning a snap. Just rub it clean, dry the surface, and wipe the surface well.
Step 5 - Upkeep
To keep the tub looking as good as it does after this thorough cleaning, clean once a week with dish liquid and a sponge. Keeping items that have dye in them off of the rim will alleviate stains. A bath caddy can help for the storage of these items. Repeat this process as often as necessary.