I keep writing this post and it keeps disappearing on me, while i switch to do work!

This is my 4th attempt!

Yes, I do leave it for a while. I do it first thing in the morning, and aim to spit on the glass to avoid contaminiation. I then shower, get dressed etc. And that's abt 30mins.
And that's right, it doesnt dry in 10 mins. Takes abt 30. and the funny thing is that the manufacturer says if more than 15 will cause contaminiation. I'll also leave till evening and see what it;s like when i get home. I clean it thoroughly with the cloth the provide and have another look thru the microscope to make sure nothing is left behind.

So I will see what the next cycle is like and if a pattern develops..

Thanks all!!