Thank you so much for your wonderfully prompt response!

I immediately boosted the hot side temperature. Ambient is a bit of another story - I'm contemplating a space heater for the room.

I wish I would have known of flashing tape much earlier. Where do I get it?! Is this something I can pick up at Home Depot, etc.? And once applied, can I peel it off somewhat easily? I try to deconstruct the entire setup and give it a thorough cleaning every 4-6 months or so...

Thank you again for all of your advice!

Melinda