Having been hot smoking loads of fish and meat for years I thought I`d try my hand at cold smoking. I bought an old oak whiskey barrell from a cider brewery set it all up, i burn the oak chippings a couple of meters away with a small gas burner under an old pressure cooker and a copper pipe connecting the two with a fish tank air pump pushing the smoke into the barrell and this all works fine apart from the four or five things Ive smoked in the barrell that have an unbelievably bad taste. Its a mixture of an appley, whisky, bitter, sour, not very nice at all flavour. Does any one know if its because the barrell has been impregnated with cider, or the copper pipe feeding the smoke . Any help would be gratefully recieved.