if it is really water marks only , pl l ask the person to give his house address and phone nos anybody can go and see his western toilet condition which is very badly maintained even i have personally visited his house he wants to remove the stains within a service, how it is possible? we told clearly to the customer it will not go at a time we have to do minimum of 5 to 10 services it depends upon the rest room condition when they signing the contract he himself has agreed that his restroom is bad, Even this customer has come to us by reference only, Almost all our clients come to us through referral basis only. For any further clarifications you can call us directly on 42046607/08