Sprayed with WD 40. Worked a treat they go down but they don't go back up straight away for some reason. Two of the three register on the score board.
Strange thing is the coil works as they come up when it's trying to detect a ball.
(It's the ones on the side, weasel drop targets)
Try cleaning the three optos on the opto board. (Yes, the same ones you probably just inadvertently sprayed with WD 40).
Use a cotton bud to clean between each U shaped opto to see if that helps.
WD 40 may be a temporary fix, but is generally frowned upon as far as pinball maintainence is concerned.
Better to remove the entire drop target assembly and clean it properly and well.
It will perform better and last longer.
