Touch N' Go Gas assist repair
Sorry no pics here right now, but here is what I did to fix my igniter.
First I made sure that the there was still propane. I could feel the liquid in the tank, hear it when opened, and use a match to light the burner tube. But my igniter didn't work.
Here is my igniter fixing flowchart:
0. Make sure the igniter button isnt wet.
1. Is there liquid propane still in tank? Shake it lightly and feel for it.
2. Connect all the lines.
3. Are you getting good propane flow through the tube, and regulator? Open the valve on the tank. you should be able to hear the tank hissing when you open it and smell the propane. DO NOT STICK YOUR HEAD IN THE BOWL. If you don't hear the hissing or smell, close the valve. There is another brass valve parallel to the regulator hose. Make sure that little valve handle is open (pointing parallel to or along the hose). If you don't here hissing still your regulator is probably shot.
4. Try to ignite the flame with the igniter push button or a match. If the igniter button works, great! But it probably won't. If the match works you can skip the tube cleaning step 5, but it is still useful.
5. Clean the burner tube. To begin fixing the gas assist pop off the clip at the end of the igniter tube. Removing this tube by taking off the igniter ground wire / element and loosening the tube clamp with a slotted screwdriver or wrench will make this a hell of alot easier. You dont need to remove the clamp. Just loosen it and pull the tube into the bowl. You can't pull the tube out without completely taking off the clamp because of the flat end that is wider. Look inside the tube. Chances are there will be ashcrud and cobwebs in it. Clean this all out with water. You can also use sandpaper on the tube to make it nice and shinier again.
6. Update: 5/2/14 with the igniter still assembled to the tube, push the igniter while peeking through the propane orifice side. If it's good you should see a spark. You might be able to do this while the burner is still on the cart but remove it if you need the space. If it's good, move to #7. If not, try the fix below. (Credit to Bman for the tip!)
Alternative way to test the igniter: Hold the igniter wires in one hand and push the buttton with the other. IT SHOULD LIGHTLY SHOCK YOU like static on a doorknob so if you easily yell expletives make sure there are no kids around. If it didn't shock you, your piezo is dead so buy a new igniter. If it shocked you, we can fix it!
Fixing igniter: Take some sand paper and lightly sand the igniter tip and ground until it's clean bare metal. It's pretty stout but be careful not to break it. Also make sure that the ground wire and bolt is not excessively rusty or you may not get a good connection. Mine was moderately rusty but it still worked.
7. Reassemble and retest. Everything should work now. If not, sell your performer and buy a big green egg.