Let's make sure the bottom plate that the razor blade rests on isn't upside down, if it is, the razor won't cut at all.
- Hold the razor head with one hand and twist handle counter clockwise. Remove the bottom plate from razor head.
- Drop blade onto pegs of head and place the bottom plate back over the blade.
- Hold the top and bottom of head with your thumb and index finger, insert handle back into head and twist clockwise.