Update: I finally got a new dimmer (thanks Lowe's!), and it made a huge difference. I now have the hot side stabilized around 90, but the ambient is still just over 70... I set up the heat lamp near the tub, which is SLOWLY raising the temperature. Getting better! :gj:
Awesome!
My cool side temp is usually just above 75, which I know is the bare minimum. But, I'm going back to Maryland soon, so the temp should rise.