When you don't clean it, do you sit for longer or do you get up at once just like when you are about to clean it?
If not, it's probably because you are standing and your blood is rushing away from your head.
Noticed that myself on one of my friends, he's okay when he's sitting, but as soon as he stands up he get's pale and gets a headache.
All in all, the reason is that you're dehydrated as stated above me, just make sure to drink some water or soda during your sessions.
Alcohol wont actually help you stay hydrated, as it dehydrates you. Just have a glass of water nearby!
Last edited by Khelina; January 17th, 2010 at 03:25 AM.