u/Hundekat

I have this 80+ year old snake plant. It was overwatered a couple of years ago and then I got advised to plant in cactus soil… I water one a month and every 3rd week ish in the summer. Some of the leaves are wrinkled at the bottom, mostly the old ones, and some leaves are turning yellow.. and I also see a few new leaves coming up.

What should I do to make it thrive better?

The soil dries out faster since it’s cactus soil only