When charging my vape I'll smoke a cig if I get the erg but I'm mostly trying to vape don't want to waste ne money anymore let alone slowly kill myself lol.
Depending on the mod you got with the tank (Pico?), as long as it's a removable battery type, you should consider you should consider getting extra batteries, silicon sleeves for them for when you'd carry them around, and a charger, so that you always have charged on the go.
A battery it usually the price of a pack of cigarettes, and will be worth it 100x over. For the price of even a few packs of cigarettes, you could have at least 2 spare batteries and a charger.
Another factor, give temp. control a chance. It regulates the amount of "heat" for the coil, and provides a even vape. In wattage mode, the coil keeps climbing as you hold it until it hits the wattage limit. This could be part of the irritation.
The Melo 3 is a great tank for the simple fact that it's part of the Atlantis coil family, which means that you have over a dozen coils to choose from. And not only that, but these coils are very easy to rebuild, costing you pennies instead of dollars per coils use you get into rebuilding such coils.
Notes about batteries, beyond the very important : Respect these batteries, Lithium batteries are NOT those AA alkalines that you're used to.
1) buy from a reputable source, get actual brands such as LG, Samsung, Sony. All other brands such as "fire-something" the Aspire ones, etc. are all rewrapped rejects from the original makers... considered still usable, but not able to pass all the quality testing.
2) ALWAYS carry spare batteries in a protective sleeves
3) if any battery is damaged, do not use it, if the wrap is ripped even a bit, get it rewrapped correctly (or get some and learn how to do it). if anything causes a short/contact between the positive and negative poles, the battery will vent (spit out it's liquid) or overload/thermal runaway. (bad, really bad, from whooosh and fire or boom!).
The times you hear of bad things with e-cigarettes on the news, is always mishandled batteries, someone shorting it in their pockets or in their mech. mods, or exposing it to high heat (leaving it in the sun inside a car).