Camera bellows maintenance

I’m curious how folks keep your camera bellows in good condition, e.g., supple.

To the mods: this is in regards to my field camera, but not 100% sure this is the right sub-forum.

I think it takes long enough for them to go bad that I don't really bother other than making sure I don't damage them. I do replace old borderline bellows rather than trying to limp them along, even if they are light tight.

Hi,

not sure if it helps as it is an european product, but I use this one: