The screenwash reservoir / bottle / tank (not sure of correct name!) on my Roomster has a very dramatic leak. I fill it, the water pours right out. I haven't yet tried to access it. Are they difficult to replace? Could the leak be from a connector rather than the container itself? I'm loathe to order a new one before checking, in case it's just not coupled up properly.
(I have a bit of an ongoing saga; since I bought the car, the back windscreen washer has never worked; seemed it needed a new pump; seller replaced the pump but it still didn't work, and they concluded it was an electrical problem; told me they need to get an electrical diagram for the car, since then, have gone worryingly unresponsive to contact.)
Because the back washer wasn't working - and I didn't know if trying to use it was resulting in water ending up somewhere inside the panelling* - I also avoided using the front washers. Hence, it took me a long time to register this problem... thought I was just mis-remembering when I had topped it up!

*some signs of water staining in the boot that I was suspicious of

Edited 18 August18 Aug by Tabareena
Posted before ready

I should add that the windscreen wipers, front and back, do work. The problem with the rear washer is that it doesn't pump any water.
I can live without it, to be honest (I learned to drive in a Morris Minor, I don't think it even HAD a rear windscreen wiper) - but having the front windscreen washer not functioning, that IS a pain.

Bumper off for a good look and possible reservoir replacement. "Dramatic leak" suggests more than a misplaced hose. Have a look at this; https://www.briskoda.net/forums/topic/147230-mk1-fabia-5-litre-washer-bottle-conversion/?hl=%20litre%20%20washer%20%20bottle#entry2798069