Help displaying my Vinyl

Looking for steerage as my vinyl records have begun to stain my wall. I change out 5 records to show on the wall about as soon as a month. When I went to alter them out this previous time I observed smudges and stains on the wall the place they had been leaning. I preserve all of them in put money into vinyl sleeves so I’m unsure what I’m doing unsuitable. I’ve been displaying them this fashion for about 6 months now and that is the primary time this has occurred. For additional context of my house I show these in my bed room and we’ve got central air, so there’s a constant 68 levels always. They don’t face any home windows and the window they’re subsequent to stays closed. Any recommendation or ideas could be so appreciated!