Wet wipes are causing thousands of "utterly hideous" blockages, costing millions of pounds a year, water companies have warned.
Sewage caused by the wipes can back up into homes and gardens, Thames Water said, with 3,500 blockages a month caused by wet wipes and flushed food fat.
The company said it was spending £12 million a year clearing blockages from sewers in London and the Thames Valley.
Rob Smith, chief sewer flusher, said: "Sewers are designed to take only loo roll, dirty water and human waste. Nothing else."