2012-10-02, 04:22 PM
You can try farming for clean slates with the Picnic Event that starts this week, but it might not be very feasible. You get a 10% no-boom, at least they were no-boom in kMS, for your first two bingos, and then for us, apparently, you get a Special Clean Slate 1%, which is just a no-boom 1%, on the third bingo. After that, the board resets and you start over. It's somewhat based on luck whether or not you get the pieces you need to get a bingo from the quest, and I think there is a ten minute delay between each quest. So at the very best, it's like an hour for a single clean slate.