Of course I opened the keyboard. The PCB traces and components are very tidy and well soldered, but I've never seen a PCB as dirty as the Strike Pro's. It doesn't affect in any way the keyboard performance, but still tells us that Ozone spared as much as they could in the manufacturing lane (I guess it's soldering paste residue, you can clearly see it in the pic below).
Show Image
(http://i.imgur.com/mrFLi9z.jpg)
Depends upon where in China this keyboard was made. Some smaller manufacturers run production in factories filled with dust and grime because who cares about cleanliness when it comes to manufacturing keyboards, right.
We here in the west think that most factories are air conditioned, dust free laboratories that could produce memory chips or cpu's but not here when it comes to basic keyboards, built down to a specific price bracket. I wouldn't be surprised if some of the workers actually had their chickens roosting in the shelving above the conveyor belts ;) .