Pressure is the problem. I only use the car wash for particularly dirty bikes such as dirt bikes that have been run in the mud. If the bike is greasy you can use any bike wash, or even Simple Green -a cleaning product found in grocery stores. Use a sponge and mild soapy water. Wash and rinse under a gently running garden hose with no nozzle. The problem is that no matter what you do the cleaning process will infiltrate the cleaner(s) past any seals into the movable parts of the frame. This includes steering, swing arm, and wheel bearings, brake and lever pivots and the brakes them selves, and chain rollers. Not to mention electrical connections. Regular wipe downs are better than a major wash. When you must wash try to minimize contact with the above mentioned points. Go for a short ride immediately after. Lube the chain NOW, as well as any thing else that pivots. I don't worry about the exhaust because it is not up swept and the ride will take care of any small amount of water. The salt is another issue. It must be washed off. That should be done every time. Salt does nasty stuff to metal. Heavily waxing the bike minimizes salt damage and makes it easier to clean. Between major washes you can use any of the bike detail sprays. Spray on and wipe off. It's easy and effective to keep the bike clean and protected.