I don't know about the sealer but will tell you my experience, I have never had mold or mildew in my shower. I do not let the water run until it steams up the bathroom. After I shower I open the curtains and leave them open. I squeegee the flat areas, then dry the whole shower with a hand towel. I have not had to clean my shower in the 8 years I have lived here. I did have to work at my last house because of closing the door and not drying it out. The trouble was mainly the door tracks.

Since I started drying it out, I noticed a bit of a shadow near the bottom about four inches high. I scratched it to see if it was scum, it was. A bit of fantastic melted it right off and now I make sure I dry that area also.

You said it is clean now, just keep it that way. Prevention is much easier than having to scrub it.

I have a window in the shower that I leave open year-round. Generally I only get a spot of mold/mildew infrequently. What puzzles me is where the white haze over the surface of the tile came from. It seemed to appear after a liberal spray of Tilex, so that's why I suspect it's the culprit. I can't figure out why it would do this.

I finally got the majority of the haze off with a razor. I didn't want to gouge the grout, so I need to go over the borders with a Magic Eraser.

I'm wondering if Tilex has caused a bit of grout to dissolve. The haze is the same color as the grout and it comes off in a powdery form. Yet the original haze was tenaciously sticking to the tile. One thing's certain, no more Tilex on the shower tiles!

I have no experience with tile cleaners at all and I had tile in my entry way and the bathrooms at my last house. I just use a wet mop and never had a problem.