Hi, To crazyvapor, The tank style attys like you mentioned have that problem fairly regularly. I used them for ove five months so I have my own fair share of experience with them. The most likely thing that going on is you have a fairly thin liquid and you are sucking too hard on the inhale draw. Begin by taking slow(really slow) gentle( really gentle) draws. You dont want to hear the air rushing into the intake holes, that is the esiest way to over feed your tank atty. Most folks have moved on from the tank style attys in favor of cartomizers, clearomizers , ce2(3,4+)and carto tanks. The tank atomizers are far too fiddley in my opinion to be worth messing around with all the freaking time. Befor you go and plunk down another almost $10 for a replacement "t" atty pick up a package of Boge 2ohm or smoktek 1.7ohm cartomizers and give them a good honest try. Follow the filling recommendations that can be found around just about every corner here at ECF. I promise you you will enjoy them much better than those tanks you are currently saddled with.
To SazoidX, Most of the tank cartos come pre punched but they dont always feed well with that one small hole. If you like thicker liquids you will most likely have to punch a second hole in almost any carto that goes in your tank. If you draw lightly on your pv, even with thinner liquid you may want a second hole. Your friend has already figured out what they need for the carto to stay wet. Everybody who uses a carto tank should have a way to determine what they need to do to make it feed correctly for the way they vape, dual coil or single coil the variable is the user. I use a single 3ohm single coil in a tank regularly. I open the single hole just about doubling overall the size of the hole, I vape 100% VG (thinned with distilled water) I make my own liquids so I have found what works best for me and even what I need to do to my liquid to help. With a little experimentation only you will be able to answer if you will need more holes.
To all. Good Luck. Happy Vaping.