I'm sure it's the same for all us,

I use a Slate, a Primos Glass and an Aluminum.

As I use the striker(s) I get the residue from the call on the striker, I then sand the Call and striker to improve friction and sound.

The Slate is doable, the glass is a headache, and the Alumimn isn't much better,

You cleaning the call and the striker, or just the call?

Sand paper on the striker, 3M pad on the call?

Do all calls have this issue?