adamviolet,

More people have ruined the early (e.g. 'E' & 'G') Schick Injectors by trying to move the spring than you can shake a stick at !!

Some of the early models allowed the spring to be rotated to release the head. This was soon replaced by a pegged spring.

With these, leave well alone. Try as the other posters have suggested - soak in detergent - if you have access to an ultrasonic bath, then that would be a very good way to go (immerse only the head, not the handle).

Good luck !

Have fun !

Best regards

Russ