Review on Pecute Scratcher Scratching Included 16 9X9 4In by Jason Dinh

I bought this vertical cat tree for my cats but the suction cups don't stick to anything! I've tried everything I know to try and get the cups to prime, but when I can't even get it to stick to the glass. smh, I should have bought something that is attached differently. Or another vertical scraper. Because now I've paid for this fancy scratching post with a nice frame and it just stands on the ground. But the cats love it. This is her favorite scraper.