Really? Pray do tell? Does it involve fairy liquid (other detergents are available) to find gas leaks? The rotters!
Do you recall the water ( condensate ) in the boiler cupboard when flue gases escaped into the house from the sampling port after a GasSafe Registered person left the cap off from the flue gas sample port.
Some of the "qualified professionals" on the forum thought it was just a mistake, a mistake that anyone could make. They expressed some irritation that it been mentioned.
Do they have negative equity ?