rear wiper

Hello everyone. Ive been on here before but cant figure out how to post a question to the general forum. I have a 1997 Tahoe and wondered what brand of rear wiper blade everyone suggests. Ive tried a couple but they just make an M shaped clearing and just checking for any advice. Thanks in advance

Both fail at once. Replaced wiper motor, helped for 3 days. Took to shop, they replaced the wiper motor, worked for 5 days. But both defrost AND wiper stop working at the same time. Fuses OK. There is not common switch. Is there a common ground anywhere? No part of the defroster grid is damaged...