Just become aware of the Thetford sachets, for use in the waste tank.
Anyone use these? They seem a good idea and one less job to do I.e. measuring out the blue.

I used to use them - (but the green ones rather than the blue ones, because some sites won't accept anything other than green/eco now) and they were really good, however I completely changed over to Elsan Organic (green liquid) last year because I can use that in both waste tank and flush water. Much easier, though sachets are really handy and much less mess when filling the waste tank.

I use them all the time. I know they’re more expensive but having once had a bottle of the blue liquid leak, the mess was unbelievable, it’s so much easier and cleaner.