3 batches and all were infected? Whoa!
You need to find out where it comes from, that can't be coincidence. Also do some serious cleaning, disinfecting, and sanitizing everything that touches your chilled wort and beer. Something in your cleaning and sanitation regimen is being missed. Look into your cleaning sanitation process!
Victory makes Sour Monkey, a kettle sour version of their Golden Monkey. Intentional infections can yield very good beers. Accidental ones are a crapshoot, but can be very tasty if the bugs work in your favor.
Sponges are sophisticated bug traps!
I use small cotton washcloths for mopping Starsan around. It creates a good foam. The cloths remain in the bucket with Starsan between uses. They get an occasional boil too.
Pay special attention to the lid, its groove and the airlock hole and grommet.