My sony LCD screen cracked while i was cleaning it what do i do.?

On your next set, do like they do for cameras in NASCAR. Get a roll of plastic film that's as wide as the TV is tall, Put roll onto a dowel on one side of set, stretch it tightly across the front of the set to a second dowel on the other side of set. Fit the second dowel with a hand "crank" so you can crank to a "fresh" area of film when it needs cleaning.