I breathe on my fingertips as though to warm them -- usually moistens them enough to get the bag open.
― WilliamC, Thursday, 4 January 2018 15:27 (six years ago) link
(xp) That sounds a bit like the Peter Cook method, as demonstrated on an edition of Room 101, which can probably be googled, and which I've used ever since first seeing it.
― Whiney Houston (Tom D.), Thursday, 4 January 2018 15:28 (six years ago) link