Sat nav cover rattle

[1st_petrolhead]

When the sat nav is off and folded down its developed an annoying rattle. When I put my finger on the cover the rattle goes and when I switch on the sat nav and it opens the noise goes.

Anyone else had this problem and found a solution

[Pete AMV8]

Fancy swapping sat navs.....mine rattles when it's open.
Any tips welcome that don't involve a hammer.