Stop buying those stupid sisal rope scratching posts. What happens when you cut a rope? It breaks, the thing is fucked. Sound familiar?
Get a scratching post made out of woven sisal. It will cost 40 dollars but last as long as like 10000 rope posts
You're welcome for this knowledge 
Cat people, you got to know the sisal to beat the sisal.
Don't get it twisted, Stay Wove.