IRNS, removing stains depends on what they are made of and what they are on.

Some stuff that will remove them will also remove/damage the finish of the material under them.

Acid for instance does not harm plastic, so I used an acid-based cleaner to get off years of soap scum from a plastic shower surround, to which new soap scum was only to happy to bond. I used a urea-based cleaner to get stuff safely off ancient porcelain that had lost its glaze. And so forth.

When you look at potential cleaners, then, look not at the claims on the front in large-"ad"colored letters-- look at the cautions and active ingredients on the back, and try things whenever possible on a small, not-prominent area before going at it like an army assault.

And you might want to think about being proactive with barrier protection so YOU do not get damaged by the cleaner. Some folks are really sensitive to environmental chemicals, and you may not know you are one of them til you get a nasty reaction.

Lots of tips in the old months' threads, BTW, sometimes with subject line TIP (Use Old Adv Search to find).

Welcome to the gang!

~S~