My main bathroom started smelling like urine a couple of days ago so I went on the roof and flushed out the sewer vent (w/o a bladder) with the garden hose but it still smells. I've tried disinfecting everything and taking everything out of the bathroom that isn't nailed down. The base of the toilet is sealed off with silicone and the holes where it's screwed down are sealed too.
Question: On average, how often should sewer vents be cleaned out with a sewer rooter? I've here 5 years and I haven't had it done yet. It's a slab house.
Any suggestion on what to do next?