We always warm up the jar of hot fudge in the microwave.  It kind of works but towards the end of the jar it's not great.  I looked online and it appears that all the warmers are more commercial and priced accordingly.

I was hoping for something in the $50 range rather than something 4 or 5 times that amount.  We don't eat that much hot fudge.

I've tried setting the jar in hot water but that doesn't seem to work any better than the microwave and takes forever.