rt bottom sticks after reassembly

recently i opened my controller and replaced my rb switch everything went solid but after i reassembled my controller my rt bottom sticks looks like its rubbing to something in controller i tried to open it again but i found nothing after several time that i open the controller i found that if i dont tie some screws all the way down its stick less but the problem still here i tried reassembling my trigger bottom but nothing helped if some one know how to fix it pls share it with me <3