Mr H has started to use one of my sofas as a litter tray? Never done this before!!!! He is 5 months neutered his routine and environment not changed. I have cleaned sofa with bicarb, vinegar, ariel, daz and have now had them dried cleaned, even had the seat and back cushions cleaned. One of his litter trays is only two feet from this sofa where it has always been but he still wants to wee and poo on sofa. At a loss as to what to do next and OH not too happy any suggestions would be great thanks