The charge that builds up is just like lightning..... caused by the friction of two objects passing each other. It just has a much lower voltage potential in your room.... it's still capable of a few hundred to over a thousand volts.... but with very low current.
In my case it's cotton jeans sliding across a polyester chair's seat cushion.... it drags enough electrons loose to make a > 1/4" or so spark on the other end. Still, that's a several hundred if not a thousand volts or more, rushing to ground through my equipment. If the gear is on, when this occurs, you will hear the "pop" in the speakers.... that indicates it got into the audio path.....
Just touch something grounded.
Or, it is really bothersome.... do what they do in many labs..... go to an electronics store and buy a grounding strap and put it on before to start working. It is a bracelet kind of a thing with a wire attached to a clip. The clip attaches to a grounded item.... could be with a screw or with an alligator type clip. It is constantly discharging the static build up in your body to ground. If you have the kind of chair I do, it might be worth investing in one of those things.... a few dollars at most.