Here is what I did so far today: I cleaned the contacts on all of the relays both under the hood and in the glovebox, I checked all connections under the hood and made sure they were tight and not corroded. Then I took a 30 amp fuse and put it in where the circuit breaker goes, and took a 10 min test drive, the defogger stayed on for 10 minutes, like its supposed to! However I don't like the idea of the fuse replacing the circuit breaker. So do they make a 35 amp circuit breaker?

circuit breakers get tired after a while, you can put a fuse in if its the same or less amps

I had a bunch of circuit breakers I tried and they all failed, so for now I will just use a 30 amp fuse. But I will be keeping a close eye things just in case. I really appreciate everyone'* tips and advice on this issue!! Thanks!