The user burned the day. I saw on the telecast in some useful tips that the key is better washed by forging all the buttons, folding in a bowl and pouring water + ferry solution. It says "I also want to, can you?". Well wave it. Within an hour, it all shines up: "I did it all! And I can put the buttons along the alphabet at the same time, or it's so inconvenient for me to print when they are overwhelming"...