How can I deal with this antisociable behaviour?

[sorryhavetochange]

Sorry but have had to change my name as people on here know me in the real world and I'll be mortified if they find out.
Basically my dc has been weeing in funny places, such as the garden (pooed in garden once last week as well). Weed in siblings toy boat, cupboard, just all over the place.

My dc has AS and is 7.

Please help, really don't know how to deal with this :(

Just a phase maybe? Attention thing? Sorry, I'm no expert!

anyone else, really desperate :(:(

Bumping for you!

ds1 (severely autistic) is weeing everywhere. It's really dull, really boring and the whole house smells of piss. I just clean up and if I see him about to do it tell him to go to the toilet.