Hi Kathy! Huge thanks for the 5-star rating!
Just like people our pups have their own mind and personality, right? It will take patience and consistency and constant positive reinforcement. When you've taught your dog in the past, what really worked for them to make sure they understood what you wanted? There are other things like using a bit of their urine on the grass or even lightly spraying the grass with Windex (it has ammonia in it and often will trigger them to want to urinate on the grass). We hope that's helpful!