I have never had any trouble with darker juices clogging my Carto's. I put some sweetener in my Tastyfinger and sure enough it is clogging my Carto. I may have added too much. Anyone else notice clogging problems with added sweetener?
Yup, it just comes with the territory. I can usually get 5ml of TV sweetened, dark liquids through my cartos before I have to give them a thorough washing.