Normal wear and tear includes deterioration of the premises that occurs during normal conditions. For example, paint may fade, electrical switches may wear out and break, pull strings on blinds my fray or break, carpet and tile may wear down. These things happen even if the tenant cleans regularly and cares for the premises reasonably. Damage, however, occurs from unreasonable use or accidents. Damage can include extreme build up of dirt, mold, etc., stains on carpets, and broken windows. Intentional alterations to the premises are considered damage. For example, the tenant cannot leave large holes in the walls from shelving or hanging pictures, and cannot repaint the walls to significantly change the color. If a tenant wants to make changes to the premises that will remain after the tenant moves out, the tenant should do so only with the landlord’s written permission.