I found this on Amazon, it’s designed to help hold down the puck & expand the surface area the phone rests on. I ordered one, waiting for December delivery though to say how well it works.
For in the house, I've used 3M "Command Strips" temporarily. As these don't leave residue or damage surfaces. In my car, I use 3M "Dual Lock fasteners."
Both of these are kind like velcro, except that both sides are identical (not hook and loop) they snap together like legos.
Dual-lock fasteners pictured below.
Alternately, there are a number of products now like the Spigen Magfit or similar concepts available on Amazon.
I found this on Amazon, it’s designed to help hold down the puck & expand the surface area the phone rests on. I ordered one, waiting for December delivery though to say how well it works.