Always place the product on a clean microwave proof plate. If you are not sure if your plates are microwave proof, you can use glass ovenware (Pyrex). To be on the safe side, you can place a double-folded kitchen paper under your Pingi. The indicator should always be facing upwards when recharging.
Avoid any contact with dirt, oil and grease. Do not place directly on the metal grate or the metal microwave floor.
After recharging, open the microwave door and allow the product time to cool down before handling it or placing it on sensitive surfaces.