This might be a ridiculous question but there is a rotten egg smell coming from one of our bathrooms. I cannot pinpoint the location except that the smell is overwhelmingly foul. I think it's coming from the sink but it could be coming from the jacuzzi tub. Originally I thought the smell was coming from the jacuzzi tub because the air intake was outside the window. Whenever I run the jacuzzi tub the smell seems to go away. On the other hand, I believe the sewer vent pipe is located on the roof, directly over this bathroom. I'm stabbing in the dark here on how to solve this foul smell problem. Any suggestions would be greatly appreciated. Thanks.