Tenants maintain all drains and waste pipes (sinks, toilets, showers Etc.) in Premises and pay the cost of clearing partial or complete blockage occurring during occupancy. No grease, coffee grounds, food, toys, etc. go down drains. Also, no diapers, feminine napkins or products, etc. shall be flushed down toilets. Tenant(s) shall use either Draintech (515) 233-3700, or Roto Rooter (515) 233-2065 for maintenance hereunder.