Question storage elecronic devices and aluminum electrolytic capacitor

[nogueiraat]

I have electronic devices manufactured in the early 90s and early 2000s and they use aluminum electrolytic capacitors and I store them in my house at a temperature of 34-36C with humidity of 58-68%. Can these devices remain stored indefinitely without use or is it necessary to follow some procedure because of the aluminum electrolytic capacitors? Do the devices work normally?

[nogueiraat]

[HarryA]

see:

https://antiqueradios.com/forums/viewtopic.php?t=444008

https://www.electro-tech-online.com/threads/question-capacitors-storage.167038/

[nogueiraat]

Electrolytic capacitor manufacturers say that if you energize them before 2 years of storage (5-35C minus 75% RH) there is no need to refurbish the capacitor.

Is this only valid for new aluminum electrolytic capacitors with little or also for old capacitors from the 90s and mounted on an electronic circuit that operates at 220V?

In electronic devices and connected to 220V, how many minutes are necessary to restore the entire dielectric oxide layer (it degrades in storage)?