Every lighter I have used from a Bic, Crickett, to the expensive ones get hot if used for a prolonged period of time.
You might want to turn the flame up so it will light the gar quicker. You may be able to use the lighter for a few seconds less.
What part of the flame is touching or near the gar?
The tip of the flame is always the hottest so if you have the flame to close to where the blue or base of the flame is touching or near the gar the flame is not as hot and therefore may take longer to ignite the gar.