I find it interesting how many people keep discussing this topic. I have never had a problem with any of the grills on either 7.1 set that I've owned. Do you guys take yours on/off frequently which may be causing your problems?

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85