The original Kodak lens has a dab of string glue on it. I removed mine with a hot air gun set to low, unsure if a hair dryer may work. You want to be careful not to melt anything.
Once removed the lens is on a spiral mount, so you can rotate it one way or the other to get better focus. At least one of the units I had from the factory wasn't focused well, while the other was perfect.
Although it's likely possible to remove the plastic hood for the camera without taking apart the whole unit... it's way easier to do it once the device has been taken apart. As the piece is very firmly in place, in my experience.
Be careful, there's a lot of small ribbon cables in the device that can be easily damaged.