As a live-aboard
on and off for over 40 years I've tried every legal
and illegal mold/mildew remover with varying success.
I'm obliged to reveal this miracle product I discovered during the Covid cleaning
product shortages and it was the only thing left on the shelf or I would never have purchased it with a name like that!
It is Kaboom No Drip Foam Mold
& Mildew Stain Remover. Spray it on, it foams a bit to provide stick-in-place coverage. Come back next day and the area is like new - - and stays like new, 3 months now on shower
They have different versions and I've found the one that has "Mold & Mildew" on it is best.
Amazon link https://www.amazon.com/Kaboom-Mildew...s%2C212&sr=8-5