You can, but don't have to.
Most people like to have tons of carts on hand, but it's not really needed.
You can just keep reusing the same ones over and over..
Personally, I only have 10 carts.
If you don't like the flavor in the stock carts, and you have some juice to use..
Pull out the filler material (carefully, don't tear it up).
Rinse it with water
Pat it dry with a paper towel
Empty and clean the cart with a paper towel.
Fill up your cart about 3/4
Carefully/slowly put the filler back in
Top off with a few drops until it looks "slushy"
Hope that helps..
Most people like to have tons of carts on hand, but it's not really needed.
You can just keep reusing the same ones over and over..
Personally, I only have 10 carts.
If you don't like the flavor in the stock carts, and you have some juice to use..
Pull out the filler material (carefully, don't tear it up).
Rinse it with water
Pat it dry with a paper towel
Empty and clean the cart with a paper towel.
Fill up your cart about 3/4
Carefully/slowly put the filler back in
Top off with a few drops until it looks "slushy"
Hope that helps..