Dear Fuller Brush Man, What is your best product for cleaning fiberglass tubs? You use to have a spray that worked wonderfully, but that was years ago.

DK,

Thanks for the question. I'd recommend using BathClean - Basin Tub & Tile Cleaner for your tub.  It does a fantastic job of removing soap scum, hard water residue, dirt and debris.  In fact, I created a video demonstration on how to apply and use BathClean most effectively.  I hope this helps!