I’m fairly confident that static electricity isn’t a big issue anymore with modern PC hardware.

Personally, I have used an electric air blower called Xpower.

Link: https://xpower.com/shop/a-2-airrow-pro-multipurpose-powered-...

Besides that, I have an air filter in my office which, hopefully, helps with gathering dust.

If you’re feeling adventurous, maybe try submerging the PC in a water tank filled with mineral oil… :P