Ok, I am looking for the thing that will really clean my black molding tile grout...
Are you talking about black grout or black mold on white grout? You can get it clean with a mixture of bleach and water in a spray bottle; let it sit a few minutes and rinse using a small brush. If you have colored grout, try using vinegar and water.
Thanks! Yes, black mold on white grout. I'll try that...
If you can find it, I like X-14 mildew and mold remover. They sell a soap scum remover too, so be sure to get the mold and mildew remover. Or use chlorine bleach like Clorox liquid bleach.
Bleach will eventually eat away at grout. A safer alternative is Oxi clean. I'd recommend you seal it after you get it as white as you want it.