Look gang. If you're worried about this with disposable cartos....
Start with DIY. vape unflavored 100% PG if you can take it. Mix small batches, increasing VG a little each time until you get to your ratio. VG is also rumored to be a "clogger".
Next add flavoring... lighter 1st. The darker/sweeter stuff is gunkier. Try grape. Try TPA RY4. Try Vanilla.
I'm sure you can find a mix that lasts weeks. But I still say its a $2.00 carto. Atties rule. Last me a month or more (I retire them at a month). Still have to blow em out/rinse em tho.
Attys just don't taste good to me....dripping is a complete PITA...and I never did win the fight with my bottom feeder. I want my carto flavor.