Couch keeps sliding
Start with clean feet, clean floor, and floor-safe grippers.
ANNOYING HOME PROBLEMS

Start with clean feet, clean floor, and floor-safe grippers.
Check frame fit first, then add friction if the sizes are right.
Flatten the curl and secure the corner without damaging the floor.
Ask what is moving, what it is touching, and why. A couch may slide because smooth feet sit on smooth flooring. A mattress may move because the frame is oversized. A rug corner may curl because the backing has taken a set. The right fix changes when the cause changes.
A solution that stops movement but damages a hardwood finish is not a good solution. Check product instructions for the exact floor or furniture material, especially with adhesives, rubber compounds, and grippers. When in doubt, test a small hidden area first.