Cleaning your lighters/lighter care

Well today i tried to spark up the second of the four monticristo petite edmundos i got to see if my first thoughts and extreme dislike towards these was justified.....it is.

But the sheer crapness of these compared to the regular edmundos isnt the problem my lighters are for a while now they have been cutting out every few seconds which makes toasting kinda hard and now they refuse to refill completely.

So im asking you guys whats the best way to clean a jet flame lighter and whats the best gas to use as well as atm im just using regular old swan.

And just in case if all els fails anyone got any recommendation on some good double or triple jetflames as a replacement.