Rear window washer

When I had this car bought a few years back and made the first check ups on the car I noticed the rear window washer wasn't working. I made some quick checks but could not diagnose the problem. I recall I had the reservoir filled up with normal water as it was obviously empty but this was not the problem. There is a separate reservoir in the back of the boot. 

I now was interested to make a start to look further into this problem. To my surprise it was fully operational now. This of course had nothing to do with the fact I recently filled up the front reservoir. I'm not sure what fixed it either, perhaps one of the multiple other electrical gremlins I tackled had a positive effect somehow. In any case, I'm very pleased with this functionality. Another item of my list. The nozzle is squirting quite a firm jet on both. Maybe I only need to consider to refill it with proper window wash cleaner and a new rubber wiper. Oh well.