What is homemade recipe to remove pet urine?

The home made product I have found to be effective on pet urine is to wet the urine spot with water, and then vacuum it out with a wet/dry vac using just the hose (no attachment). Afterwards, spray the area with Odorxit concentrate. If the urine has already seeped through to the padding beneath, use Odorxit magic.

You can also put dry bicarb on the stain, leave it for a while, and then vacuum it off. This should also work.

The key, however, is to keep the urine from getting to the padding under the carpet first - so the quicker you get to the stain, the better and easier it will be to remove it!