My kitchen sink was blocked so I called a professional to unblock it. The water eventually goes down the drain slowly, but when the dishwasher is working the sink fills with water. I haven't tried the washing machine yet. I had other professionals in the past. They all used a drill to clean up the pipe and I didn't have a problem for over a year. The technician from your company used a manual wire and acid. I believe I could have done that myself! I am pretty certain that in a couple of weeks my sink will be completely blocked again. I strongly believe that if the proper professional equipment was used, like in my previous experiences with other specialists, the problem would have been resolved. I am looking forward to your reply.