Help!.. My Tomatoes are leaking??

Well... that's what it looks like anyway 
I opened the greenhouse this morning and for a moment I thought my greenhouse roof was leaking..  all of my Toms were covered in droplets of water, the panels in the greenhouse looked as though they were covered in condensation too... I've done a bit of google'ing and come across something called 'Transpiration'... does anyone think this may be the cause, or am I looking at something more sinister ??

More ventillation needed. It has been very humid lately.

Ventilation is the answer - leave the door open.

All plants transpire - it's the plant equivalent of breathing.... they lose moisture through their leaves. (leaf cells - stomata) 

Get some ventilation into that house!  With humidity that high you are a sitting target for blight.

Gillie