Crystallising in few months doesn't sound good

I mostly never have so much slides ready to use all the kit as "one-shot" - maybe only after I've done some bigger trip, but this is rare.

Would love to have a kit that'd be good for at least half a year or so if I store them in smaller airtight bottles and use anti-oxidant before closling. So you reckon the 6X concentrates can't make that long on a shelf?

I though the 6X kit is more stable since the chemicals aren't mixed and Fuji promotes this new kit as not-so-consumerist kit as the previous ones - i.e. it's designed for today's machines that have lower throughput and stay shut for long periods of time. But looks like I got this wrong?