i'm not exactly sure on specifics of danger, but i do know now would be a good time to go threw your house and get rid of all of your non-natural cleaning products. we did this with last pregnancy, and replaced things like comet, and clorox clean-up with vinegar, tea tree oil, and some ecover and seventh generation products. i think that one of the last few mothering magazines has had a special sections on natural cleaning products that work for almost anything. it also makes me feel a lot more safe with a toddler who goes through cabinets. i don't have to worry as much about him ingesting the products. i almost drank nail polish remover and attempted to drink several other cleaning products when i was little. it would have killed me if it got in my lungs. most of the seventh generation products we have say they are an eye irritant but i don't think it would kill ds if he drank them. i know your question was not about drinking them, but i was just pointing out the cleaning products can be dangerous in your house for other reasons than inhaling them. i also don't like to have lingering chemicals on surfaces that my children are going to play on, and eat off of.