I've even been tempted to drill some 1" or so holes across that [now exposed] top wooden rung to see if it will 'air it out' even more but I haven't bothered yet. If anyone does, let us know.
Happy Lissn'n.
Lissnr
I removed the headrest from my Poang as I never used it. Also have considered lowering the back a bit to air it out as you say.