My Benson pees on the couches when we aren't looking.But he has had this problem since day 1.I'm trying the Bach Remedies now.Their are 3 that have urine problem for cats so I'm mixing those 3 with spring water.So far nothing.But maybe I need to do it for longer.He's a good boy and it's not that big of a deal because we covered the couches all with petmats.
The remedies:
chestnut bud
elm
willow
Those are the 3 that are used for controlling pee box problem cats.
Good Luck.It may stop without doing anything.Try not to panick.Maybe you can get some plastic or put some little baskets on the chairs upside down like we do