I actually set all parameters 10 apart, adding a 4th; so the highest default setting was 15; I set mine at 10, 20, 30 and 40 (even though it said 30 was max). I then tried a vape at 30 which was a nightmare, extremely hot and burnt to no end; changed to 20 with same results, changed to 10, still same results. I could see that this offering from them to change the settings is flawed so I reset to factory and all is good again. Even at 15 default settings, the drip tip gets hot in about 5 seconds; I wish they had the option to change it out.