I had the same issue with my sock grabber until I upgraded to the "SockSnatcher Pro" from Bed Bath & Beyond. It’s a bit pricier, but the grip is way more reliable.
Another thing that helped me was washing the tips of the grabber with soap and water. Sometimes dirt or oil buildup can make it slip.
Another thing that helped me was washing the tips of the grabber with soap and water. Sometimes dirt or oil buildup can make it slip.