We borrowed this incubator off a friend of my dad's. I think it's a Brinsea Octagon 20 MKIII ?!?!? That's what it says on the front of the instruction manual thingy anyway... The incubator doesn't have anything to measure humidity with, which has has me worried for the last 18 days, but we've just been filling the trenches like the instructions say. I've just read the manual again because i've heard you're supposed to raise humidity for the last three days - is that right? Well the incubator doesn't say anything about raising humidity on day 18, it says you should fill both water trenches after the first pip... This would involve opening the 'bator and faffing about with the water...can this be right? I thought it was crucial you DON'T open the 'bator after the first pip?? Sorry for the long post. I'm lost here, any advice or thoughts would be greatly appreciated!