Step 22: FLATTEN THE REED SWITCH BOARDS
After the reed switch assemblies have cooled down, you may notice that they are not totally flat underneath. They will be easier to glue in place if they have a nice flat surface. Therefore, you must lightly reheat the bottom of the reed switch assembly with your lighter to soften it, then place it on a smooth flat surface and apply gentle downward pressure. I like to put a few layers of soft cloth between my hands and the reed switch -- this prevents me from accidentally smashing the fragile glass reed inside.