We have had our frenchie neutered about 6 weeks ago. He's just turned a year old. We bought him a new waterproof bed about 4 weeks ago and he's still marking it at night, it's only a slight bit but it's frustrating as I wash it everyday at the minute? Does anyone have any advice? Is there something I could spray to prevent this? He's fine with hour training just this one problem. Not sure what else to to.