Long-Lasting Toilet Residue & Odor Preventer

The user consistently experiences yellowish residue and a pee smell in their toilet, despite flushing and cleaning. This indicates a need for a passive, long-term preventative solution that works continuously to keep the toilet bowl clean and fresh without frequent manual intervention. Current solutions like tank cleaners or under-rim brushes are suggested, but a product that integrates these needs into a more effective, sustained, and easy-to-use form could be beneficial.