For details see instructions: http://www.turboflame.co.uk/maintenance.php Basically 3 steps should be taken: 1) Bleed existing gas/air mixture (depress the intake valve similar to taking out air from car or bicycle tires) 2) Fill with recommended butane gas (brands such as Colibri and Newport) 3) Wait a few minutes and adjust flame height in=f necessary. Also a good web site showing butane lighter refills: how to refill your lighter