Been using these stoves for years in the army and they are very good. I have tried different fuels and they tend to clog up the pipes. Using the colemans fuel I do not have this problem. Also if leaving the cooker unused for long periods the fuel becomes unstable so good practice is to empty when being stored.

If experiencing problems with burning or leaks it mainly was the pipes being clogged with different fuels, quick fix was to strip the pipes and run through with cleaning brush and soaking the wire. this tends to fix most of my problems.

hope this helps, it worked for me.