I'm willing to try anything. The next door neighbour and the next again have chosen to have cats but no choice for me. Being good cats, thay don't mess around their own homes. I'm sick of scooping up piles of foul cat s**t. And having to cover newly sown seeds with prickly stuff.
I've found crushed mothballs work quite well as a deterrant but you have to keep re-applying and the garden doesn't smell nice, although it's better than cat wee. I've just got a water pistol and that also seems to work well, but only when you catch them. You have my sympathy with your little one crawling around.