Well, there are no glow plugs on a clone. There is a spark plug.
You use the silly wrench that came with your clone. You take the spark plug out of the engine. You then hook the spark plug back up to the engine and have a partener pull the cord while you hold the spark plug tip on the block of the engine, or anything metal on the engine. You should see a hot blue spark. Any other color means it isn't hot enough.