I have taken the opposite approach, keeping the canopy open whenever in the hangar. This is the “relaxed” state for the struts, and feel this preserves their life. Mine are almost 3 years old (flying) and I am just now noticing some weakening. I plan to replace them in the near future.
We had to replace one of ours and I know a few other 14 owners that have had to do the same.
No issues since we replaced the failed one in over 150 hours of flying.
(But I wouldn't keep the airplane hangered with the canopy open unattended for long periods of time)
How hard is it to change them out? I have a idea but just wondering. Does it make sense to have a spare or spares on hand?
McMaster carr sells them with a spring loaded locking pin which will keep it open and from slamming shut in a gust of wind. I use one on the pilot side only, normal strut on the right.https://www.mcmaster.com/gas-struts/locking-gas-springs-6/