i dont think u can dissolve them but extract them out but then u would get ice pick scars if it was deep

Use black soap and AHA.

I'm with Ripon10! Think about some AHA. Maybe try extracting them (as long as you don't cause too much irritation by extracting) and then putting AHA or some sort of topical medication on right after extraction. May take a few tries to reduce a blackhead's size long-term. Blackheads are a b!t$# but keep working at 'em!