It seems there is trapped air in the gas tank. Turboflame lighters run off butane gas. For butane to be propelled it needs to be mixed with air in a premium ratio. As the butane is used up, it is replaced with air which after a while means the butane/air ratio is no longer ideal for ignition. This is why you may see gas in the tank but have no ignition. BLEED the air by pushing the intake valve at the base of the lighter with a ball point pen or small screwdriver. Press untill all hissing stops. It is easier to bleed the whole tank empty from all butane/air mixture before refilling. As noted before, always use the recommended gas brands such as New Port or Colibri.