5 Household Cleaner Combinations You Should Never, Ever Mix

When faced with grossness at home (read: the whole house has the flu, or you found a cockroach infestation under the sink, or the dog trashed the room after eating who-knows-what), it's tempting to bring out all of the big guns and throw every cleaning product you've got at the problem. But don't! First of all, most cleaning products are plenty effective on their own. Plus, combining them could be toxic--and in some cases lethal.