Tube amps covers on or off


I just brought myself a new onix sp3. Unfortunately I have to put it at the bottom of my glass rack. This little beast runs a little hot and I am a little afraid that the temper glass may crack eventually with the heat. Is this a stupid concern? If I leave the covers off will the unit run cooler overall?
daimbert
Yeah..I like using tube gear without the covers myself...just has more of the cool factor. You can sit there in front of it at night with the lights off, getting lost in the glow and the music! :-)

Have fun!
Post removed 
anything which might vibrate would be better off removed, regardless of the component. i remov the cover from a cd player and preamp. i use forceed air periodically, to remove dust.

i also use foam and other small anti resonant materials on top of capacitors, resistors and power supplies, when appropriate.
Definitely with Gmood on this one. Nothing like having a bunch of glowing phalluses in a dark room when you're getting ready to put the moves on a sweet lady.