Huust

Hello, I would like to say from the beginning that I know that snakes sometimes take time to adjust to new enclosures. As I have stated in the title I have made some changes in my snakes enclosure (different substrate and hides) and he has been moving around quite a lot. I am worried because he is quite old (about 17-20 years) and has been quite lethargic past few years. Should I revert the changes to calm him down or do I wait some more time (I has been about a day now)? Any advice would be appreciated. Thanks.