Save your sleeve
You know the type, leaving snail trails up their sleeve. Have a dig at them and help them at the same time. If this doesn't stop them, no one will. Ideal for Mum to give to the kids and make washing a little less manky, or for that friend that gets a little feral and needs a hint.
Perfectly pocket size: Width 15cm x Height 12cm x Thickness 1.8cm