How to Clean Tough Stains from a Bathtub. Nobody likes the thought of taking a soak in a dingy bathtub. With constant exposure to moisture, bacteria and mold For heavier dirt or mild stains, sprinkle the tub with baking soda and spray on the vinegar-and-water solution. Let the mixture bubble for several minutes, then scrub with a soft cloth or sponge until a paste forms. Let the paste sit for 15 minutes, then wipe and rinse. Put the shine back in your porcelain sinks and bathtubs by giving them a good scrubbing with full-strength white vinegar, followed by a rinse of clean cold water. To remove hard-water stains from your tub, pour in 3 cups white vinegar under running hot tap water. Before we talk about how to clean a stained bathtub, there are two general points to make; the first is that a stained bathtub can still be a clean If, no matter how much elbow grease you put into it, your old bathtub still has stains it might be that you haven’t tried the right solution yet. Use a soft rag or sponge to dip into the soap mixture and scrub the tub or sink. Rinse well. For monthly or deep cleaning (when moving into a new home or cleaning up a newly purchased vintage tub or sink), pour warm water into a bucket and add 1/4 cup of baking soda and 1/4 cup of ammonia. Learn the best way to remove stains from your bathtub with Merry Maids DIY cleaning tips, for removing stains from porcelain, acrylic, enamel tubs and more. Stubborn bathtub stains make your otherwise clean tub unsightly. Here are some suggestions on how to remove those stubborn bathtub stains Discolorations or stains on your bathtub make the entire bathroom feel unclean, but you can remove most of these with a bit of time and effort. The cleaning Then grab a cup, bucket, or your shower wand (if your tub has one), and rinse the soap down the drain. Then stand back and admire your clean A baking soda and water paste will clean stuck on gunk in the shower and tub (use vinegar instead of water for really tough stains).