Compressing the spring/springs without forcing them with something like pliers should cause no more stress than when firing, considerably less, in fact.

I'm interested in this because, while it has to be an isolated phenomenon, I have the full-sized 2.0 9mm, the Compact 4-inch 2.0 9mm, and the Compact 3.6-inch 2.0 9mm.

So far, no spring breakage.
If there's something in the gun that breaks a spring, I'd like to know.
If it's something in the cleaning process, then I won't be quite as concerned.
Denis