If your lighter is hissing, that's a sure sign that you are losing the butane. I think you have a bad lighter. <br><br>I wrote in the above post that I prefer the Bic electronic, but I really meant to write that I like the Cricket Pocket Electronic model. I don't know if you have a Cricket, but mine doesn't seem to leak like that. Maybe yours is a little broken or imperfect, or maybe you have a different brand. <br><br>I have seen the Bic electronic, but it is pretty large and has an inconvenient safety release. I didn't notice it leaking, but I didn't look for that specifically.<br><br>The child safety feature on modern disposable lighters is intended to prevent children from being able to start fires with the lighters. In other words, the various designs may not all be intended to prevent butane leaking, but may just be intended to prevent sparking. The Cricket lock seems to do both in my experience. It is an excellent design in that it is effective and also very convenient to use.<br><br>If you put a tremendous amount of force on the locked button, I'm sure the lock could be damaged to the point that it would allow leaking, but I don't think that would happen in typical use or typical wear-and-tear.<br><br>