I mean Hydrogen peroxide. I suppose you could use a bleach solution. One hybridizers presentation I've seem, she germinates hers in damp paper towels (in baggies) with a 10% bleach solution. She leaves them out on the counter and not in the fridge. IMHO, the bleach or hydrogen peroxide just helps keeps mold or fungus at bay. I don't know that it really helps with germination. There are varying opinions on the subject about which way works best and if certain things actually help.