I used the original polyfil that came with my cartridges for about 4-5 days, then I found some foam in a local pets-store... I could not find any blue foam in any of the pet-stores near me, but found some black foam... To begin with I thought it was brilliant, but I used far more juice than with the polyfill... It never seemed to wick all the way to the bottom, and I was not 100% happy. Yesterday I tried a PTB mod... I used a PG Tips tea-bag as that was the brand in our office canteen...
I have one cart with the top end all folded over, and one where I just cut the Tea-bag strip to the right size, rolled it up and put it in a cart. With the dropper I use, I put 9 drops (nearly filled cart) of 32mg juice (Black Cherry from enjuice.co.uk) and vaped.... all day on that... so I was happy with the amount of juice, I got a really nice vape, flavour and plenty of it
I think I am totally converted. It also seemed to me to be better using something that is used in the production of a substance for human consumption (Tea) rather than something used to filter fish doings out of water.....
Either way I am happy with the mod.