Fuel Injector Cleaning

I can see how well my oil change topic went over so I have another little diddy for y'all. Went to a jiffy lube type place and this tech takes the hose off of the air filter that goes into the fuel injection area and puts on a rubber glove and shows me that it isn't clean enough to eat pizza on in there. I said thanks but no thanks and threw a can of techron in the tank. I have 71,000 on my Accent 2000 and have no problems with gas mileage 38 highway 30-32 city. I figure leave well enough alone and the techron is probably the same thing he's going to charge me 50 bucks for. Any advice, ideas, etc. :smokin: