Open and place it in an area that is clean and dry. Moisture can be harmful to the pack n play – be it of wooden or metal make and should be strictly avoided. Also, always clean with a slightly damp cloth (metal) or a dry cloth (wood). For a pack n play with a bassinet, wipe the surface at least once a week. If possible, run a small vacuum cleaner along the sides and inside the pack n play to get rid of any dust or small particles. This is extremely important for the health of your baby. The baby pack and play should also be dusted, washed, or vacuumed before use.