How to prolong the lifetime of your mug heaters?

How to prolong the lifetime of your mug heaters?
  1. Do proper pressure not too much tight
  2. Heating with tumbler inside (can be any defective tumblers)
  3. Clean the tumbler well before you stick the paper
  4. Wrap extra protective paper in case of ink come out
  5. Use same shape of heater as the tumblers
  6. Use the same length of heater as the tumblers
  7. Temp set in 356F, then test the proper time
  8. Do not pull on the cable, hold the metal cover to move
  9. Handle closed to loose the screws then slide out to change a new heater
  10. Always be careful and wearing heat resistant gloves
  11. Do not change the default data, short press set button is ok
  12. It’s ok not to follow all the tips, for your reference only