Question for FP pros out there

[Prestige_Swiss]

Hello ladies and gents,

I am curious as to the way to store an FP that won't be used for a little while. I am specifically talking about my MB 146. I use my MB Legrand BP more then anything and I had some ink in my FP the last time I used it and when I took it out of the case I keep it in the in window seemed clear so I was curious as to where the ink had gone. I filled three cups with water and decided to clean it out in the way that I would when switching ink colors until the water came out clear.

If I am not planning on using the FP for a bit, should I just store it cleaned out with no ink? With the piston up, down? Im not sure what is best to keep it from having any issues when I do decide to refill it. Thank you in advance.