The last two bottles I bought ran out of propellant before the cleaner was gone. Well over 1/4 of the can was left. Just today I was at Napa picking up some Techron Fuel System cleaner on sale for $4.99 and I picked up two more cans of Brakleen on sale for $4.00 each. I get home and test the cans and one won’t spray at all, ***! I returned it for another one and the counter guy says this is the first time he heard of this problem. He did mention the local jobbers like the Napa Mac‘s parts cleaner. I only buy the red chlorinated one.