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If you have a pair of jeans you can sacrifice (or can get hold of some raw denim), you can use a double thickness of the denim to make a two sided fabric strop.

You can then paste one side of it...

Thanks for the pic!

Assuming the wardrobe door doesnt move or open when you are stropping, then that should be fine for anchoring.

If you find the back and forth movement harder than...

What sort of fitting is on the end of the strop? Is it a D ring type fitting, or is it something else?

What are you attaching the strop to? You'll need to make sure that whatever you're attaching...