Two young boys, good at using toilet properly but occasional drips onto seat etc. I clean toilet every day including floor (the toilet is flush against wall so no space behind toilet) but still the urinal smell persists. It almost feels like the smell is saturated into the porcelain now. Tmi but if i give the rim a sniff after ive cleaned it thoroughly i can still smell old wee. I'm sick of it. How can i get rid of smell and clean it even better? Can't afford to replace toilet