Draw a shape in the cat's litter box to know quickly if it's been used. I used an S for my cat, Scottie! : r/lifehacks
How To Clean Your Cat's Litter Box | Pet Hero
Facebook User Shares Genius Hack To Keep Kitty Litter Tidy
HOUSE*TWEAKING
Litter Box Hacks That Keep the Box Clean - Jess Caticles
Litter box hacks that will change your life (and your cat's life) - YouTube
Top 10 DIY Litter Box Cleaning Hacks | Pretty Litter
7 Life Hacks for Cat Owners – Door Buddy
Amazon.com: MS Cat Litter Box for Easier Handling, Enclosed Design, Prevent Sand Leakage, Easy to Clean and Assembly and Large Space, with Cat Litter Scoop (Moss Green) : Pet Supplies