Wow I'm sorry I missed this, never got the push notification, hope I'm not too late.
To remove the hose from both ends you need to compress the wire c clip. It is a bastard to do. You need two small pins to push into the holes on either side. But before you start, you need to spin the c clip in position till the opening is at the 6 or 12 o'clock positions so it compresses easily.
The first time I tried, it took me an hour to get one c clip out. As for pins, I found sewing machine needles cut down worked.
Do NOT scratch the inner surface, this is a sealing face.