Double kitchen sink has been fine until recently (no changes or additions made) when it started to smell really bad. I've taken off the u-bend, cleaned it out, removed and unblocked overflow pipe. Water flows very freely now but there is the most disgusting smell coming from the overflow now. I have tried putting "Drain Magic" down it, when that didn't work, I put loads of boiling water down it, I've even tried thick bleach but nothing has worked. I am considering taking a small toothbrush to it and see if that makes any difference but I'm not sure whether it would fit from underneath due to the closeness of the sink bowls.
I would greatly appreciate any other suggestions because I really don't know how much longer I can cope with this vomit-inducing smell!
I would greatly appreciate any other suggestions because I really don't know how much longer I can cope with this vomit-inducing smell!