Reapplying every 500 flushes doesn't seem practical. For a family of four and two toilets, if everyone goes four times a day, you're talking about reapplying ev

Reapplying every 500 flushes doesn't seem practical. For a family of four and two toilets, if everyone goes four times a day, you're talking about reapplying every 2 months. I think it depends on how exactly one applies it. If it’s just pouring something from a bottle over the bowl, it is perfectly practical, as this is already what one usually does when cleaning the toilet.