Zippo MPL

I bought two Zippo MPLs about a year ago. These are fancy multi-purpose lighters you can use for your wood stove, candles, what have you. They worked great for a few months. As the weather got cooler, their gas output got less and less, and finally one of them wouldn't light at all. It has a small adjustment knob at the bottom but even with the highest setting, it wouldn't light. I had to send it back to Zippo for repair. I contacted them over the web, they sent a special box for me to mail the lighter with. After a few weeks it came back and was working great. Recently my second lighter started acting up the same way and I thought, I don't want to send it back and go through that ordeal again. So, I started taking it apart, after I took at the hook at the bottom and a few pieces more I realized I didn't have to unscrew anything. The adjustment knob comes off when you pull it out. You can then put it back in with a little turn and now you have another quarter turn to increase the output. If it is not enough, pull it out again, put it back in with a little turn and now you have another quarter turn for more output. If you look at the bottom side of that adjustment knob you will see that it is designed to limit the min/max output within a certain change. When it got shipped from the factory it must have been summer time so the output was enough, but when the weather cooled, the gas didn't have much ooommph to escape to put it in scientific terms. I was thinking why wouldn't they describe this simple adjustment in a small piece of paper when they ship it? I am sure I am not the only person who ran into this problem. The lighter is very elegant, the mechanics are wonderful, just what you'd expect from Zippo. Hopefully they will fix this minor problem in their Zippo MPL 2.0.