This is great replacement stuffing for 510 carts. One cart can be used a long time - washed and dried, restuffed with this precut blue foam, the blue foam holds its shape and can be easily rinsed and patted dry. Also less likely to give burning stuffing taste than white stuffing.
https://strictlyejuice.com/index.php?main_page=product_info&cPath=67_49&products_id=222
When using blue foam, on a full fill remove the foam (a smooth unbent small paper clip helps), fill the juice cup 1/2 way with juice (2/3 if you are daring but more chance it will leak). Stick the foam in tapered end first. Press the foam down into the liquid to get it wet. Reposition the foam at the top edge of the juice cup, and top off with 1-3 drops of whatever it need to look just damp on top, not a puddle. While
vaping, top off as needed. When topping off doesn't help, do a full fill.
And when you get tired of atomizer and cart, try Boge standard resistance 510 cartomizers with your favorite thinner juices. Most people vape their favorite juices with cartomizers - holds more liquid, needs liquid less often, provides a more consistent and troublefree vape (once you learn to keep them damp). Downside - a continuing expense, limited lives (I get about a week or more out of a Boge which costs about $3 each plus shipping)