Review on Fluidmaster 8202P8 Flush 'n Sparkle Toilet Bowl Cleaning System Refills, BioBalance Septic, 2-Pack - Enhanced for SEO by Richard Cheng

I've been using them for years and love their blue color and ease of use and the fact that only the bowl turns blue not the tank. I've just used up some old cartridges I've had for a number of years and new ones recently ordered in June 2020 don't work like the old ones at all. After a week the holder has only a slight pale bluing and after most washes none. I noticed they come in cellophane now, they're not used to it, so I'm guessing it's a new factory or process. I'm talking about the blue ones, I plan to try the green ones but if they aren't better I'll have to find a new product,