DH -
1. Nothing is wrong with my chip slot. I do occasionally clean it like every 5 years. Sometimes it wouldn't work with a game. Normally you can just slide the game slightly, flip the power switch and it would work. When I clean it works just fine.
2. I used the wand labaled B, I realized that in the manual this is actually the wand used for Gameboy and Sega Game Gear. The width of the cleaning cart is the same thickness of a Hucard, but not as wide as a hucard. What I have to do is clean with the cleaning cart all the way to the left, then all the way to the right.
Here is how you use the kit to clean your Duo (or any TG / PCE system):
First: the tools you will use for the cleaning:
1. you use the wand by inserting and removing about 6 times (no fluid).
Here is a shot of the cart before and after inserting 6 times (notice the HuCard pin marks in the photo on right):
2. Use the fluid (it is a mixture of water and rubbing alcohol) and dampen a clean cloth with the fluid, doesn't have to be overly soaked.
3. Use the dampened cloth to wipe off the cleaning wand then wipe the wand dry with another section of the cloth:
4. Repeat steps 1-3 until you get alot of dirt out of your system (I ususally will go like 6 intervals). Yes that dark stain came from my Duo (yuck):
Ahhhh......look at those pearly Hucard pins: