The details for the inexpensive heated mat I use are in the first comment below ⬇️ If your starter has ever been sluggish… if your dough takes forever… or if you’ve ever risked the “oven light method” like I did and accidentally COOKED your starter 😅… this is your sign to get an inexpensive seed heating mat. This mat is under $20. It’s big enough to fit my dough bin, starter, etc. I keep mine set at 77–78°F for a gentle, steady warmth. Not hot. Just cozy and consistent. No expensive equipment.