doing a bbu service this week have mi,s have everything pretty much under control but as I am not a service engineer I do want to cover absolutely evey angle so I have a question for those who do these quite often does anyone put a smoke pellet in the flue liner when they do the boiler I think it might be a tad ott but I,d rather ask those with experience everything else seems self explainitary don't bother suggesting get someone who does these there don't seem to be anyone around here who wants bbu,s