We have Kanger single coil tanks, and I have been managing to get at least a few extra uses out of each coil just by cleaning them. I have not gotten up the courage to try dry burning yet, but I did just order some organic cotton to try my hand at re-wicking. Anything to save a little money is good, although I must add that coming from cigalikes with cartomizers, we are finding that the clearos with replaceable heads are already saving us money.
Don't give up. It does get better as you get more comfortable and familiar with your gear and the vaping terminology. Anything I have learned has been from just cruising ECF and reading members' reviews and posts.
Look at this 20 second vido of dryburning a silica wick.
It's fun to watch; it's reassuring to watch your wick turn white and clean and see that your wick is not burning.
Just don't put too much power or you can burn out your coil; I dryburn mine at 3 watts.
You don't have to wait for the cotton before you try dryburning