My go-to is 350 for 7 minutes in a toaster oven. The slightly higher heat gets the bottom crisp again without making the top rubbery. It's the only way I can get that fresh-out-of-the-box feel.

Honestly, that "rely too much on one tool" thing hits home. I once had my only drill die on me right before anchoring a big threshold. Now I keep a cheap corded one in the truck as a backup, just in case. It's saved my butt more than once.

They do good work. Make sure you ask them to check your attic ventilation while they are up there, sometimes moisture buildup makes it look like a leak.