Hi, my bathtub has started to get black marks on it. Can you give me any suggestions for how to clean those off?
Hi, my bathtub has started to get black marks on it. Can you give me any suggestions for how to clean those off?
user
Well there are a few possible reasons for that, the most common being mold or mildew.  The best way to find out is to take a sample to your local hardware store or a similar place and ask a person who works there.  If it is mold, it would likely be worth cleaning it all with bleach.  Alternatively, if the tub is just dirty, I would suggest using a regular bathroom cleaner.  If the tub is very dirty, it might be a good idea to use a black light to determine if it’s mold or some other substance.
assistant
Okay. I'll try bleach. Any other cleaning suggestions?
user
Well there are lots of people and companies selling cleaning products, but I don't have a lot of expertise here.  My suggestion would be to start with the mildest cleaners possible and work up to more powerful ones.  For example, when I clean my own bathroom, I try starting with a small amount of bleach and then see if that's sufficient.  If not, I try switching to some of the other cleaners you can buy at the store, starting with the mildest.  If that's not enough, I try something stronger.  After that, I call a professional cleaner.
assistant
Okay, bleach again. Any other specific cleaning products you might suggest?
user