Take a microwave safe bowl and fill it with water. Add a dash of vinegar. Set it in inside and turn the microwave on for 5 minutes. The water will turn to steam and the steam will soften up all the gunk. The vinegar helps to absorb the smells.
This is easy clean up also if you use a roller and need to take a break and do not want roller to dry out wrap it in a plastic bag and it keeps paint wet until you come back stays for about 48 hrs clever! Learned that from a professional painter