Given that I have an ileostomy, dealing with toilet bowl odor is a constant task. For a while, I was using a bleach cleaner spray and bowl brush after every dump. But all that does is replace the lingering odor of shit with the lingering odor of bleach. Then, I ditched the bleach and got out the bottle of Pooph I bought some time back. After I flush, I use the bowl brush while the tank is filling. Once it stops, I give a few healthy sprays of Pooph and voila! The odor is gone. Don't know why I didn't try that sooner!
Daniel