When carpet is crushed or matted from the pressure of furniture legs, etc., brush lightly or use the edge of a coin to rough it up. Place a steam iron a few inches from the surface, spray with steam and brush. Repeat the process until pile is standing up again. Never touch the iron to carpet. Brush with stiff bristled brush. Hair spray may be used to set carpet pile that is not resilient.
When a carpet is damp for any reason, be sure to place pieces of aluminum foil under the legs of furniture in contact with the damp area. Metal tips will rust and leave a spot on the carpet, and even furniture polish might be drawn into the carpet to leave a stain. Never vacuum a damp carpet!