It's best to keep your scissors in a dry environment. If they get wet, dry them with a clean towel. Wipe the blades after use with a dry cloth. If your blades seem to catch when you close them, or if the action is not smooth, turn the screw slightly counter-clockwise to loosen. If the shears are too loose and are bending the material instead of cutting it, turn the screw slightly clockwise to tighten.