Tips for getting rid of the smell of artificial grass puppy training toilet

[HPandBaconSandwiches]

We have a gorgeous 12 week old Welsh Springer and going through toilet training.
We’re using an artificial grass patch for overnight which I rinse off with a hose twice a day and then wash with mild detergent once a week.
It was fine at first but after about 3 weeks has really started to pong!
I’ve tried vinegar to get rid of the smell but not working.
Any tips?
Many thanks

You need an enzyme cleaner. Try a pet shop

You can buy big bottles of cleaner especially for artificial grass on Amazon

Thanks to you both! We have an enzyme cleaner for accidents but I didn’t realise you can use it for a big bit of artificial grass. Off to see if amazon Australia have the bottles too...!

What have you got underneath the grass?

It’s one of the 3 layer trays - grass then bumpy plastic to raise the grass, then the base tray.