I’d like to post my opnion on this subject.
Is there anything written anywhere that says you have to “get rid” of a scapular? That sounds like disposing of something unwanted, like a used Kleenex.
I don’t “get rid” of my worn scapulars. I don’t dispose of them, either. I wrap them carefully and lovingly and put them away in the box where I keep my rosaries and prayer cards. It isn’t like I have to rent a storage unit for them. They’re small and they have value to me in that I humbly wore them for Our Lady for a year or more (thank you, Rose Scapular Company for making such well-sewn scapulars!).
I’m sure someone will post a quote from somewhere to show how mistaken I am, but I just can’t recommend “getting rid” of a worn scapular. I just wouldn’t want to. What’s the benefit of disposing of a scapular by burning or burying? None that I can think of. Dogs bury bones, people burn cigarettes. Neither method is very reverent or respectful, is it? But keeping something tucked away and next to rosaries and prayer cards is, in my humble opinion, respectful and loving.