I would maybe get one like this if you’re going to be doing a lot and aren’t too concerned with the wax coloration.

MOCOHANA 60W Electric Wax Seal Warmer with Wooden Handle Wax Melting Spoon Hot Melt Glue Pot Wax Sticks Wax Beads Melting Furnace Tool for Wax Sealing Stamp https://www.amazon.com/dp/B07Q2T5161/ref=cm_sw_r_cp_api_glt_i_X7WRT63AH47DN2AJ8PKH