What 0.6Ω actually means, and why your coil dies in three days

Every product page lists resistance in big type, as if lower were better. It is not better or worse — it is a design choice that only makes sense next to the other numbers.

The three numbers that matter

Resistance (Ω) — how much the coil opposes current.
Coil mass (g) — how much metal has to heat up before you get vapour.
Power (W) — how much energy you push into that metal per second.

Change any one and the vape changes. Resistance alone tells you almost nothing.

Why 0.6Ω and 1.2Ω feel different

Take two coils made from the same wire:

The 1.2Ω coil uses thinner wire. Less metal, less mass, heats fast at low wattage. Good for small pods and mouth-to-lung draws.
The 0.6Ω coil uses thicker wire. More mass. It needs more power to reach the same temperature, and it holds heat longer after you stop firing.

So “0.6Ω” mostly means this coil expects more power and produces more vapour per puff. It does not mean the vape is better; it means it is a different shape of experience.

Why coils die early

A coil dies when the cotton around it scorches. That happens for three reasons, and none of them is “the coil was low quality”:

1. Not enough power, not too much. Under-powering a thick coil is the classic mistake. The coil heats slowly, the liquid does not vaporise fast enough, and the cotton sits wet and boiling instead of wicking fresh liquid. You get a burnt taste at 25 W on a coil rated for 40–60 W.

2. Chain vaping. A coil needs a second or two between puffs to re-wick. Five puffs back to back on a dry-ish coil will scorch the cotton in a way no amount of waiting fixes.

3. Sweetener. Commercial liquids with heavy sweetener caramelise on the coil. You will see it as dark residue on the cotton and a flavour that fades before the coil is “dead”. Rebuilding or dry-burning does not remove it; the cotton is already coated.

What to actually do

Match wattage to the coil’s rated range, and start at the bottom of it, then work up.
Prime a new coil properly: a few drops down the centre, fill the tank, wait five minutes.
If flavour drops before the coil is burnt, it is usually residue, not failure — change the coil when taste fades, not when it tastes burnt.
If you vape heavily, a lower-mass coil at higher power often outlasts a heavy coil at low power, because it recovers faster between puffs.

The takeaway

Resistance is a starting point, not a verdict. The number that predicts your experience is power density — watts per gram of coil — and the number that predicts coil life is how well the cotton can keep up. Manufacturers rarely print either, which is why two coils with identical specs can feel completely different.