Picture two shows the end of the brass pawl in the opening of the reverse unit in the top right position. It sounds like it is stuck in this position with the locking lever in the off position and power cut.
Just pushing it down with you finger will see it drop to the bottom of the opening. The bottom of the pawl will be resting on the bottom of the black frame. The top of the pawl will be exposed. I don't use anything on the Q tip to clean the top but there is no reason why you can't use rubbing alcohol, just make sure you use the other end to dry it off completely. Then do the same on the frame using picture two as reference and use another Q tip to clean the top right of the opening of the frame.
i find that this gives about 95% reliable cycling of the pawl dropping when the power is cut to it.
