KLV,
I don't wax my rail. I spray mine with silicone and wipe it down. For me the factory servings have a short lifeand I have had them fail inas little as 50 shots. They two options you have in regards to the serving are:
1. Learn to reserve the string yourself. It is easy if you follow DNK's instructions. I reserve my strings and find that the serving will last several hundred shots. Here is the link:
http://www.huntingnet.com/forum/tm.aspx?m=2005725&mpage=1
2. Buy a high quality string from a professional string maker like DNK. All of the reviews I have seen on his strings have been fantastic.
Bob