Washington Revised Code Title 59. Landlord and Tenant § 59.20.140. Duties of tenant

(1) Keep the mobile home lot which he or she occupies and uses as clean and sanitary as the conditions of the premises permit;

(2) Properly dispose of all rubbish, garbage, and other organic or flammable waste, in a clean and sanitary manner at reasonable and regular intervals, and assume all costs of extermination and fumigation for infestation caused by the tenant on the tenant's leased premises;

(3) Not intentionally or negligently destroy, deface, damage, impair, or remove any facilities, equipment, furniture, furnishings, fixtures, or appliances provided by the landlord, or permit any member of his or her family, invitee, or licensee, or any person acting under his or her control to do so;

(4) Not permit a nuisance or common waste;  and

(5) Not engage in drug-related activities as defined in RCW 59.20.080.