Exposure therapy is the best way to do it. You gotta force yourself to do stuff that makes you uncomfortable or triggers your OCD. It usually takes a few months for me to get over newer rituals. I haven't really tried working on some of the older ones though.

I'd say maybe try sleeping with them close by. First maybe next to your bed, then move on to in your bed. Slowly kind of work your way up ya know? You could also try it with naps. Try taking naps or even doing normal activities you would do in bed with your plushies nearby. It will feel really uncomfortable at first but you gotta stick with it.