This machine has no map or memory as it moves around the house randomly and gets stuck on carpets, hangers, sofas, I think you get it. We didn't use the wipe function. The wheel on the tank came off in the 1st month. When we asked for a replacement they wanted us to box up the entire vacuum cleaner and ship it back to China where they would investigate the problem and either fix it or replace it. Due to the mess of shipping to and from China, we decided to do nothing and leave the broken device behind so we had something to use, although it wasn't what we were hoping for. We just wanted a replacement part. Wouldn't buy.