steam clean it, wipe with water, let dry
apply a leather coating. Some are good, decent, really good
then, warm towel wipedowns monthly should be all you need with periodic interior detailer spray wipedowns. No need for heavy cleaning all the time if you maintain it. A product like a light cleaner with some UV protection in it will work great for monthly or bi-weekly wipedowns
https://www.supremedetailsupply.com/...erior-detailer