While I believe any of the suggestions posted here will work, V1rowt8 is dead on the money with his advice to add a humidifier. My second hobby is furniture making and I know all too well the damage that dryness can do to your furniture in the winter. The best thing for your health/static sparks/furniture is a whole house humidifier. I too, have an Aprilaire on my furnace, they are low maintenance and relatively inexpensive to install & operate. Do yourself a favor and check it out.
static electricity
I have found that when I walk across the room and touch my preamp, sometimes a tiny spark travels from my finger( static electricity) Nothing unusual in static electricty, but it produces a crackle sound in my speakers. The preamp is Audio Experience Mark II (all tube). IF I touch my amp ( Velleman 4040 tube) or CD player ( AMC CD6D TUbe) I never hear any crackle. Is this dangerous to the speakers, tubes or solid state circuits?? Should this happen? Hopefully one of you fellows with some engineering experience can help. All of the equipment has heavy duty, 3 prong, detachable power cords, and are plugged into a surge protector.