Thanks I will try the white vinegar, because I have some of that in my pantry, only trouble is both my cats come in and out this door as well, I guess if they are not keen, then I will know it will work,besides it is to stop the same tom coming back , smelling his urine and doing it again, you all have such a wealth of information, I knew someone would beable to help, thank you both for your responses,much appreciated.