I got something similar about 2 years back . “While you are here “ can you give that a quick scrub , get the green off . Pointing at a small 3 panelled polycarbonate verandah . Yeh I said, thinking 10 minutes , tenner . She stood watched me clean it . Then in the house she goes and comes out with 2 twixes . My son had now come round the back wondering what was taking me so long . Giving it the , I’ve done 2 houses while you’ve been messing about round here . Perfect timing . I handed him the twixes , thanked her and said put them in the van , remind me to call at the bank on the way home and deposit them . The look on her face was worth a tenner all day .