I bought a heat mat for my small greenhouse tray in hopes to bring up the temp in the little house to 77 F which I’ve read was the best temp or the baby seedlings. I noticed there is no thermostat on the mat to adjust the heat which when plugged with my tray sitting directly on top of the mat brings the temp up to at least over 80F before I unplugged it. Would it be safe to put a towel between the mat and the tray to try to manually adjust the temp in the house? Or should I be using a different method. My house is not warm enough to get the 77 inside the little house on it’s own without turning up the house heat which is out of the question after looking at our last gas bill. The temp in the house with the light gets between 68-74 during the day/night. I didn’t use the mat last grow and my plants did fine but was trying to fine tune it a bit more this grow. Wish I would have known about the thermostat thing before I purchased it. It was about 30 bucks. Any suggestions besides a new mat with a thermostat to adjust the temp in the greenhouse a bit higher? My seeds are starting to pop and I already have a few in the plugs that should be popping out of the plugs any day now. Want to be as kind to them as possible. I used this same little house with my last seed grow with good success.