Cleaning the throttle body is not rocket science, but there are a few pitfalls. Technically you’re not supposed to clean them, and several manufactures will place a sticker by the body stating this. Several use a special coating on the bore that can be easily damaged, Ford is perhaps the most critical. If this coating is damaged on a very rare occasion the idle may increase slightly. Normally the PCM would handle this, if not remove the IAC connector and adjust the base idle with the AC off you may also have to remove the neg battery terminal and clear the computer so it can re-learn its strategies, but as I said this is a rare problemIf you use sea foam or GM cleaner which is expensive, there should be no concern; some of the stronger carb cleaners may cause some damage. Do not use a cheap cleaner it will cause more problems than it cures.Remove the intake tube to the throttle body; if the body is easy to remove go ahead it is easier and neater but you will have to replace the gasket. Watch out for cooling lines as this is not worth messing with often you can loosen the body and not totally remove, leave the cables and hoses connected disconnect the easy connectors, do this only if the rear is difficult to get to but normally it is not that dirty on the rear of the throttle blade. Your main area to clean is where the blade meets the bore at idle and the small bypass passages on the bottom. A few rags under the body will contain the mess. In some fashion hold open the throttle .a broom stick works. Spray the area down, use care that the red straw does not shoot into the engine. Leave it sit for 10-15 minutes then with a soft bristle brush, tooth brush is best, scrub the area down flush out with cleaner. Do not use any more cleaner then is necessary as it may cause cat problems. May have to be repeated if extremely dirty, it should be as shiny as a new nickel.I would also remove and clean the IAC at this time, be sure the pintel is dry before reinstalling, and do not lose the oring this is easy to do. Reassemble and go for a drive to clean out all the junk you sprayed into the engine. Ignore the white smoke it will go away quickly. One other trick to clean out the engine is to disconnect a vacuum hose and place it in a can of gum out and run the engine if you do a lot of stop and go or idling use the full can if not use only ½. If your cat is on the way out this may cause a problem you may also damage the O2, I recommend doing this only in extreme cases as there is a good chance of doing damage. Be sure your problem is carbon as many times we are too quick to place the blame when it is another problem. This will not clean the throttle body only the intake and upper valve area.