Well, for all you people who don't want to spend any more money buying friction stickers because the topmost grippy layer wears out too fast and the lower cloth layer is practically useless to you, this is for you.

What You Need;
First you need a half worn friction sticker. One which has worn till the grippy top bit of it has all but gone away leaving the cloth part below it.
Then, you'll need Silicone. I guess you can use any kind of silicone, as long as its silcone. Some examples of silicone are gasket filler or glass sealant. You could get the huge bottle of 100% silicone which costs $39, but thats a little too uneconomical. I used a small tube of silicone sealant which costed me $9.
Optional; Some tissue, something to stick the friction sticker on and something to spread the slicone. Unless you intend on spreading the silicone with your fingers, I suggest you use something like a screwdriver or a blade or something like that. I think the tissue is self-explanatory.

The Process;
Put a little silicone on the FS and spread it around evenly. Then put some more and then spread it even more. Easier said than done. Silicone can get a little messy sometimes.
Optional; Wait about 10-20 minutes for the silicone to dry then put another layer of silicone on it.
Wait about 30-60 mins for the silicone to dry completely then try it out.

If anything, silicone is the original grippy stuff on the friction sticker i guess. It might be just me or the stuff I use but I find that this wears out faster than a normal friction sticker. Oh well, at least it works.