I've tried Astroglide and Wet (both the water and silicone based kinds) but I didn't think either was good enough to continue spending money on them. Some good, viscous saliva always seemed to do the job better. Suits me just fine as I've always been the do-it-myself sort of guy. The only problem with that is that I can almost never produce as much of it as I need. Frustrating, so frustrating.
In desperation I began looking for homemade lube recipes. I found very little, but one of the recipes I did find included xanthan gum. Xanthan gum... hmm... I'd bought a bag of it a year or two back because I thought it might help me bake a loaf of bread with a tougher crust and chewier texture, but it didn't work and it has been gathering dust ever since.
Then I did some reading. Xanthan gum is a very interesting subtance. Developed after extensive research by the US Department of Agriculture. Used both in food products as a stabilizer and in heavy industry as a lubricant. A lubricant? Really? The xanthan gum I'd bought at the grocery store came as a powder. I'd never tried seeing what happened when I dissolved it all by itself in water. So I tried it and I was blown away. The consistency, while not as good as that of saliva, was way better than the storebought lubes.
I've now been using it as a lube with my fleshlight for about 2 weeks, and I'm quickly coming to regard it as the best thing that has happened to my sex life all year. The most wonderful thing about it is how little xanthan gum powder is needed. A little seems to go a long way. I've found that I only need to add 1/4 teaspoon of powder (tops) to 1/2 cup of water in order to yield a mixture that is neither too viscous nor too runny. I like this stuff so much that I've settled into the habit of mixing up a 50ml batch of this stuff every day.
What I'm still trying to figure out is why this stuff isn't more popular and talked about as a sexual lubricant. I've noticed that some commercial brands of lubricant list it as an ingredient, and of course there's the recipe I got the idea from, but that's about it. Obviously it's biologically friendly since it's used all over the place as a food additive. I don't get it -- seems like one of the best kept secrets on the Internet to me.