How do I keep hold of stray cats from spraying on the porch outside? Stray cats visit, spray on front porch afterwards leave. Porch...

Stray cats visit, spray on front porch afterwards leave. Porch smells impossible.
Answers:    That's usually a territorial marking point.

You might consider one of the motion-activated sprinklers -- though you'll want to warn the messages carrier! e.g.
http://www.critter-repellent.com/contech...

You'll also want to use a pretty upright odor remover -- I like Odomute, but nearby are many brands available.
http://www.fanciers.com/cat-faqs/misc.sh...
TOP TIP I own used it all the time. Cats smell back they spray or poo. get some wash up liquid beside janola in and purify area first to catch rid of any smell there. after get chilli powder (once the nouns is dry) and sprinkle it everywhere they only sniff once and consequently run away cats are very smart and that demanding cat will not come back. Be aware if it rain you will have to sprinkle again at least possible for the first week.in the summer you can sprinkle it on your garden and they wont poop contained by their either. i own tried moth balls and didnt work. plus they look monstrous.