|
I think you'll probably have luck with a fresh razor scraper and superfine steel wool to clean up the leftovers. I've used both on glass before and didn't scratch anything up.
As for the "surplus" power when you don't need to run the fan...
An extra battery for something makes more sense than "trickling" a block heater. Store it up and unleash it all at once would be more effective....
... or make a "power pack" that you could use to power something small in the house. Cell charger? Laptop charger? Bedtime reading light?
|