Ok...a couple of non-negotiables when caring for eisenglass.
1. Never roll it on itself.
if you are going to store it rolled up, roll it into a cotton bedsheet.
2. It's best to store it flat and stack them.
but don't let 2 sections touch directly - they stick together.
put sheets in between each panel.
3. Water is your friend when caring for eisenglass - use lots of it directly from the hose - not from a bucket.
4. Anything with ammonia in it will ruin your eisenglass in one quick pass. This includes Windex and most glass cleaners. Very bad.
5. Paper towels are not your friend. Paper towels are made from wood fibers and scratch the living daylight (literally) out of your plastic.
To clean eisenglass - hose it off first. Lots of water. Then, with a clean (or better yet...new) microfiber towel, wipe/wash the each plastic panel with the hose pouring water in front of the towel and the towel wiping where the water just poured. Lots and lots of water.
Dry each panel with a chamois. I had a chamois that I kept specifically for my eisenglass panels. It didn't get used for anything else.
If your panels are hazy or otherwise dirty in any way, go back to the hose and microfiber washing towel. If that still doesn't take care of it, use Klear to Sea as you would any other cleaner.
Once you have the eisenglass clean on both sides - use Klear To Sea like you would a wax. Spray it on, spread it in a thin layer, let it dry to a haze and buff it off.
Wiping in circles is bad. Wiping side to side is bad. Wiping top to bottom is the preferred method. Eventually, you will get light scratches in your plastic panels. Having the scratches in a circular pattern creates distortion that is hard to love. Same with side to side - the light scratches horizontally make things look bad. Light scratches top to bottom from wiping top to bottom, have the least impact in your sight lines.
No matter what is on your plastic panels, the cleaning process is the same. Water, then water and a microfiber towel, then Klear To Sea.
Wind that carries sand - bad for eisenglass. If you can't avoid it, then it is what it is. The scratches you will see are then just scars and you being proud of them is just showing off. Good for you for having been where it was windy, sandy and you needed your eisenglass up.
The enclosure you had made sure looks awesome. Kudos.