You CAN pput foil into a microwave

and i GARUNTEE it wont spark but there is a trick to it , some food stuffs cook better when sealed in foil as they are then steamed within their own steam so less dry when cooked Jacket Pots being one example of thi

You have to ensure that you put the item ie foil wrapped potatoe in a tupperware tub etc SEALED with a lid

The microwaves will pass through the tuupperware but they will be slightly magnified meaning they wont pass BACk out of the tupperware tub

Unlike foil in the microwaeve that reflects the rays straight back at the machine etc

Nige

Try it i DARE YOU ALL

im right