Hello, my name is Victoria and I'm a new lover of various cacti and succulents. With that being said, my boyfriend made me a cactus hanging pot to go in my car (on the rear view mirror). I know this is not the ideal place for a plant, so I bring it inside every so often. Wim (the cactus' name) appears to have a bleached and shriveled appearance on one side. I kept him inside for a week while I was out of town and came back to two small brown spots on the same side as the bleached look. I left him in a window while I was gone, so I wonder if this is from too much sun? If there's absolutely no way he will survive there, I will permanently leave him inside. He's just so cute in my car though haha. I've attached some photos to show the affected areas. The photo that shows a little name tag on the far left is of the healthy side.