Hi, been some time since I posted on here. I've had a waterbbox cube 20 for a couple years now. Just bought an Opus G2 300. Been looking for a post but cant seem to find. I have GSP on my back glass. Also when I placed the GSP there I didn't realize a very small green mushroom hitch hiker was on the frag. Long story short I have alot of mushrooms on the back glass now. My question is when the time comes. Do I just use a razor blade to remove the mushrooms and GSP from the glass? That's what I'm assuming.