the reflector can be removed, use a small flathead screwdriver from inside the head, small taps on the edges
of the plastic "lens" while the head is face down on a table. once the lens is flush with the rim of the head (it will stop there because it face down on the table), hold it in one hand, then push one side with the driver, rotate 180, push the other side, etc.
**notice** there is a small lip on the inside of the head, make sure you are tapping the lens and not the lip...
this might be a bit of a pain but the beam will greatly improve.