I had a new stock taker last week, when he sent in his stock report my draught wine was down over 5 litres in a month.Thats 40 125ml glasses at £2.00 that’s £80.00! When I went through the stock report I noticed he had not allowed wastage for cleaning of the lines, I have 4 lines with approx 5 glasses in each, I clean the lines every two weeks, hey presto with relief I found the 40 glasses of wine. I rang the stock-taker and informed him of his error. His reply was he hadn’t accounted for the waste because he didn’t know of any establishment that cleans their wine lines, and it is unnecessary.In 10 years in the trade I have always cleaned the wine lines fortnightly, if left any longer crystals form and deposit in the glass. Your advice please.