How much does my age affect my sperm?
Can I do anything to make up for my age? Like eating healthy and exercising?
What you mention will certainly help, but there are a number of factors that influence male fertility. You can read more about them in this article: https://all-about-fertility.com/lifestyle-factors-and-male-fertility-what-you-should-know/
I was not aware that hot baths could have an impact... 😐