Harmful vapors can and do occur when mixing household products. For example, Bleach and Hydrogen peroxide should NEVER be mixed and Bleach and Ammonia should NEVER be mixed. Most commercial "Green Cleaners" utilize soft water (ph above 7), hydrogen peroxide; customers are told to dilute these products significantly. Why is it we can put "developer" (in cosmetology developer=peroxide) on our hair is concentrations starting at 6%, but we can't put 3% hydrogen peroxide on our floors to clean them??