for you, as your car runs the oil gets dirtier and dirtier and dirtier until you need to do an oil change. re-using contact lens solution is like taking that old dirty oil you just took out of your car and deciding to put it back into the car with some new oil mixed in. we're really sorry but we don’t seem to have any offers or events for compasses.
we're sure there must be something happening here but they just haven't told us about it! please do mention this to compasses when you next visit them. 