Whatever you do, DO NOT apply crox to you main strop you use everyday!!! Once you put crox on a strop it's next to impossible to get it completely out of it.
It's only to be used after honing to smooth the edge or to touch up on the first sign the razor is getting dull so you need a separate strop for that, either hanging strop or paddle with leather, fabric, balsa or whatever you choose.
I stopped using it as my honing improved and rather do a touchup on a stone and follow with only canvas and leather, some like it though and for new honers it could partially make up for bad technique (not saying it's only to be used by beginners).