Just another thought and my
worth folks.
1. You are putting that tip in and out of your mouth hundreds of times a day it gets germs on it folks and dried juice etc.
2. If the coil gets gunked up your draw will not be as smooth and burning the coil can damage the carto. I know they are cheap.
3. Take a good look at the filler after 4 or 5 refills, some of mine actually were turning black. Mold? Dirt? Dried juice? I then clean them.
4. If you want to change flavors, you just have to get that old juice out first.
There are probably more reasons to keep your equipment clean. Boiling only takes 10 to 15 minutes once a week and personally I find the taste improves, especially with thick juice.

1. You are putting that tip in and out of your mouth hundreds of times a day it gets germs on it folks and dried juice etc.
2. If the coil gets gunked up your draw will not be as smooth and burning the coil can damage the carto. I know they are cheap.
3. Take a good look at the filler after 4 or 5 refills, some of mine actually were turning black. Mold? Dirt? Dried juice? I then clean them.
4. If you want to change flavors, you just have to get that old juice out first.
There are probably more reasons to keep your equipment clean. Boiling only takes 10 to 15 minutes once a week and personally I find the taste improves, especially with thick juice.