Been there, done that, cleaned the sink, got the Tshirt. Thankfully jugs are cheap enough.
I get around this now by not heating my starters. Room temperature DME goes into a sanitized jug with filtered water out of my fridge and a pinch of nutrient. I'm sure my risk of contamination goes up a bit, but I haven't had a problem yet. I do boil my starters when I'm growing up bottle dregs or very old yeast as an extra precaution, but if I'm pitching a healthy pack of yeast to a starter then I figure that DME and my water supply are sanitary enough for my purposes.