Weird question. I am typically a proponent of using Diamatious Earth or other natural pest control but not real sure atm of its effectiveness so I am looking for others experiences. This spring we have noticed the flies are terrible. We never had a fly issue until now and are getting desperate to find something that works. We are noticing more roaches than normal as well. Actually this is the first year we have ever seen them in the house ewww! I am assuming the early heat and lack of rain is part of the problem. So, I sent DH out to the barn to find my bag of DE so I could treat around the house to help control the flies. When he found the bag in the barn it was unusable. The bag itself was infested with termites of all things!! Many people use DE for termite control but these buggers were living in the bag of Food Grade DE like it was their own personal getaway. Now I am not so sure about the effectiveness of DE, googling it I came up with info that DE is not supposed to expire but apparently this bag has lost its effectiveness. Anyone else have issues with bugs still thriving in DE?