I use a sticky roller on my cat regulary to get the loose hair off. The one that you peel the paper off
I would go through a roll of that paper every day if I did that. 😄
The thing I have learned about the puzzle bowl is that you have to give the cat time to adjust to it. At first, my cat was saying "what the heck?! I can't get to my food!" But I ignored his complaints because I knew if he got hungry enough and wanted it badly enough he would learn how to get it. I also started out only putting the kibble in the places easiest to get to. Pretty soon he had those all figured out and I started putting the food a little farther in, harder to get to. He's in that stage now, and eventually I will put food in all the spaces, even the hardest ones, once he is confident in his ability to get the food out.
I have made it hard for him to knock the puzzle off the counter where he is fed so he can't just dump it on the floor.
An unexpected, and very welcome, side effect of my having implemented this is that he no longer screams at me at various times of the day for food. Food is always available to him. But, since he has to work to get it, it being always available doesn't mean I have to keep filling up a bowl, which would make him fat.
I had not even thought of this solution. I just saw an ad on Craig's List, and they only wanted $5 for it, so I thought why not. And it's great, better than I could have hoped. I hope it works out well for you too and I would love to hear from you how it goes with your cat.