You can take it off for a shower, there are six screws in total you need to remove. 4 at the bottom and 2 behind the panel. Once you've got the frame off. You'll need to remove the tensioner nuts at the bottom and some screws on the frame itself. After that you slide the top struct off and pull the frame apart. I washed mine using simple green, which didn't seem to have any negative impact on the panels. When you wash your panel, simply spray the cleaner on and agitate with a soft dense makeup brush. Then rinse it really good with tap water. Finally, you'll want to flush it with plenty of distilled water. You can get them pretty cheaply at Walmart for 97cents/4L. Dry it as best as you can, and then put it in a shady place to dry for couple of days. Then you should be good to go. The makeup brush is a very useful tool even for regular cleaning. I used the brush to clean mine regularly with vacuum. The brush turned black at the first time and I can never wash the color off the brush anymore. Most likely the panel has attracted lots of micro particles of dust which is very hard to wash off, but that also means that the brush works. Make sure you get a soft brush as dense as possible so it'll be the most efficient. Good luck.
