How do I help my blister heal quickly?

I got two on my heels from walking. One has not popped (and I won't pop it because I know that is bad for it) but the other one popped on it's own because I didn't notice I had it until I felt my sock was wet. How do I take care of the popped one to best prevent infection and experience the least amount of stinging? Should I keep it covered or does it need air? It's pretty big and seeping a bit too... ew.