Tenants are responsible for the behavior of all their guests, visitors, and invitees. Such persons may not break the tenant’s lease or these rules and regulations. Tenants are responsible for paying for any damages or clean-up resulting from the conduct of their guests, visitors, or invitees. Tenants will use toilets, tubs, and sinks only for their primary purpose and will never use them to dispose of sweepings, rubbish, rags, garbage, sanitary napkins, or other items likely to clog them. Tenants are liable to pay the landlord for any expense incurred for repairing damage (including unclogging toilets and drains) caused by tenants, their guests, or invitees. Tenants will perform reasonable housekeeping in their premises to maintain them in a clean, neat, and sanitary condition.