Thanks guys.
I asked as I am finding a new passion for waxing and have extended our services, bought a whole new bunch of PR waxes and was just thinking about leaving the pots on 24/7 with thermostat on low overnight.
Maybe the answer is timed pots as Jacqui mentioned as all the pots (3) we have are just on thermostats, and I put them on full first thing to they melt the various waxes to consistency and then lower them for during the day til ready to use them and adjust accordingly and currently turn them off when we close but I am debating whether to leave them on lowest setting overnight.
From a safety point of view this should be OK in theory, shouldn't burn too much electric but I am a bit of a worrier at times and wouldn't want to burn the place down!!!!!!!!
Thinking the same about my paraffin wax, it's just easier if it is ready when we come in without having to come in way earlier to get it ready sort of thing.