I use 30% food grade H2O2 in a spray bottle for mildew. It works incredibly well. You just spray it on, let it sit and then rinse or wipe it away. This is not the hydrogen peroxide you buy at the drugstore. I order it online. Again, it's food grade 30% H202. You can dilute it, but I find it works best to just spray directly on the mildew and let it sit for a minute. 30% food grade hydrogen peroxide needs to be kept in the refrigerator or freezer to keep it stable.
Happy cleaning.
COMMENT FROM DEBRA: I agree with you about using H202 (hydrogen peroxide, but I don't agree that you should just spray 35% Food Grade Hydrogen Peroxide around undiluted. We used to use 30% hydrogen peroxide in our
chlorine-free pool (now we use 50%), but you have to be extremely careful with this! It is not toxic, but it is extremely caustic, which means it can burn your skin. Gloves and goggles are recommended at 30%.
When my husband Larry heard me exclaiming about this recommendation, he came in and said, "Do you want me to bring in the container of 30% so you can see all the warning labels all over it?" When I declined, he said, "Just to let you know, once I did spill a drop on my hand, and the skin turned white and the top layer of skin was killed. So make sure to tell everyone this is really dangerous stuff!"
The website
Hydrogen Peroxide (H2O2)--The Amazing Secrets That THEY Don't Want You to Know! has some really good background information about hydrogen peroxide, what it is, what it can do, regulations, etc, and a very clear
explanation of the different grades and what they are used for. (Check this out, as it also tells the contaminants in the different grades--drugstore H202 contains
phenol, a very toxic petrochemical, and it's not on the label.
