I use a "magic white" sponge ... just dampen and wipe over the screen on the inside ... does a mighty job n no mess, hoses, gizmos or gadgets required ... Kay
Ohhh for goodness sake ... why do people have to be sooooo precious ... it's a chook ... it has feathers ... so what if there's a tiny little feather still there ... grow up n grow a brain ... pull the suckers out, cook n eat