In my last motor home we had day night shades similar to the ones in our MS. I made two mini 4" high, 6' wide, 4' long pools. I used a very small amount of dawn dish soap in one pool where I washed them. I rinsed in the other pool. I also used a small nail brush to clean them. At first I only did one but it was noticeable cleaner then the other ones so I ended up washing all of them. Another small project took hours.
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