Also, how should I go about removing the heatmat? I’ve read some suggestions such as a blow dryer to melt the adhesive, running a knife between the heatmat and glass and even just trying to carefully peeling back with your hands. Any more suggestions or even risks I should know of?
You can just peel it. What I do with heat mats that I use for hospital/quarantine is I scrape off all the adhesive and when I need them for something, I use use a small amount of duct tape.
1.0.0 Red Stripe BP (Noodle)
0.1.0 T. d. elegans (Carole)
0.1.0 Fawn English Angora Rabbit (Petunia)
0.1.0 Domestic Cat (Winnie) "Life is better with a snake."