Due to some incredibly dry air in my area and some cold nights I've had to resort to using a fleece blanket liner on my TB as the medium weight blanket I bought for him is out being cleaned (I got it used).  I've always used a combination of a fleece saxon blanket liner and a turnout sheet on cold nights in the past, but this year the static from the blanket has been the worst I've ever experienced.

 When I went to take off his blankets to readjust them (they had slipped to one side) the split second I touched the blanket my horse and I both got a shock that made us both jump.  It took forever to get the blanket off and my poor boy was terrified by the end because every time I reached out to touch him he got shocked.  I ended up switching out his fleece blanket for a wool cooler to use as a liner because I couldn't get the fleece back on him as he was so scared it was going to shock him again.

 He lives outside and does not get clipped and we only blanket when it gets below 20F.  Does anyone have any tricks for helping reduce the static from a fleece blanket as I feel like he's being punished for standing still for his blankets to be removed.  The other thing is the other day the static on the blanket was so bad that a spark jumped between the blanket (it was just the fleece on not the turnout on top) and the electric fence for the cow pasture.  He didn't touch it, but he was walking by so he also got a shock for simply walking past the fence in his blanket, and the fencer for the cattle puts out approximately 4J of power so there was a pretty good snap.  He's actually starting to become frightened by his own blanket.

I agree - a dryer sheet is probably the easiest thing. Though you can also try washing your fleece sheets in a front-load washer - run it on cold water only, perm press, and add a fabric softener that will reduce static - like Downy. You can also then dry it on low/tumble only, with a dryer sheet. That may help the anti-static properties to last longer, and then if you wipe them with dryer sheets when you take it off, the anti-static properties 

may last longer.

Many years ago, as a young programmer at an electronics manufacturing plant, I had to have ESD shoes and a touch a discharger plate before entering the plant to change printer ribbons or fix their computers.  Closer to the fab, everyone was required to wear ESD coveralls.  ESD was a very serious threat to the fragile boards and circuits that cost many hundred of dollars each.

When visitors come, they got to wear ESD straps on their feet and ankles.  They could not cross the red lines on the floor.

Anyway, I wonder if touching a horse's hair first (no nerves there, yes?) would ground out the ESD?  Or, maybe having the horse brush by a grounding plate (very impractical, of course).