1.8 ohms is too low for an evod. You're really talking about pretty much the cheapest and most finicky tank out there. I'm not saying it's not a good tank, I own two of them, but don't expect it to function like even the slightly more expensive protank II Mini. You might try a 2.4 or even a 2.8 and if you have VV you can adjust it. Clean the tank each and every time you change flavors. You may think, oh, my lemon will mix well with my orange, so I won't clean the tank. No, quite possibly the two flavors won't mix right and gunk up your coil. Also with the evod, don't screw anything on too tightly, just snugly. The tighter you screw on that head to the tank the more that rubber gasket gets pushed over the wicks and that can keep it from being properly saturated. Also, let the juice steep for a while. They say a few minutes but with the evod, let it sit upright in the tank for an hour or two to let the juice saturate the wicks. Otherwise your first couple of puffs will be great but the juice won't catch up and you'll end up dry hitting and burning, and if you burn too much you can corrupt your juice with the burnt taste and then you'll still get the burnt taste no matter what you try until you wash everything out once again. New vapers like myself tend to play around with their equipment too often. My advice is, clean everything out really good, fill up the tank to maximum, and when you get a good vape don't mess with anything until the tank is empty, don't fiddle with anything, be glad it's working properly and don't mess up the balance. Want a different flavor juice, get some more tanks. I have five tanks now with five of my favorite flavors in them working excellently and I'd almost rather just buy another tank than mess with the equilibrium.
Oh, and how to clean, I have yet to have a problem using warm water and paper towels and a dry burn, that is if you haven't completely over used it between washings, gunking everything up, which might require vodka or something, I don't know--I don't do that.