Although what you posted is not untrue. A lot of the "blowing trick" had to do with the fact that you would reinsert the cart multiple times. The connector actually acts as a cleaning device for the carts. Reinserting multiple times will actually clean your cart to a degree. But I will completely agree with this part: > It could even be theoretically harmful to the game operation due to the condensation put on the connectors. This is in my experience 100% true. The moisture and condensation from blowing into the cart will cause corrosion and dirt build up over time. I *strongly* suggest you not to blow into your cart. If you feel the need to clean it. A quick and easy fix is to grab a cotton swab (aka Q-Tip) with some isopropyl alcohol (the higher the % the better) and clean the cart that way... yes the back of the cart tells you to NOT DO THIS. I believe that to be a money making scheme.