We had a dreadful smell develop in our kitchen in one corner, could not trace what is was so had the dishwasher out, took all the pipework out from under the sink, cleaned the drains but the smell got worse, had the floorboards up upstairs and found nothing, in desperation started sniffing the walls in the area where the smell was, lo and behold I found a patch that absolutely stunk, think something got in through an air brick or somewhere, got into the cavity and has died, there is no access to this area unless I take part of the roof off, resorted to spraying the wall area with a deodorant, can anyone give me an idea of how long the smell is likely to linger.
Thanks