buy a new printer...
With lowend models that's almost always cheaper than getting them repaired.

And that's one part of the reason noone will buy your printer. Resale value after repairs is just about zero, and repairs are expensive, so why should anyone give you any money for it?
In fact, you'd likely have to pay to leave it at a store because it will cost them money to get rid of it.

You might try some pure alcohol, it might work.
Sold in better pharmacies for sterilising wounds and stuff.

Or chemical solvents, but those tend to be hard to get and often damage the plastic as well.