Here is the original item:
My appliances are always hungry.
(A) For example,
the dryer will eat underwear,
(B) and the
microwave will suck off half a frozen
dinner (C)
while it is cooking.
You wanted to do this:
My appliances are always hungry. For example, the dryer will eat
underwear and the microwave will suck off half
a frozen dinner while it is cooking.
Removing the comma after underwear is an error. You have two main clauses joined by and. In such a situation, you need that comma before the and.
You might want to review the rules.