Who/what is gnawing my leaves?

Hi guys.
My plants have just recovered from a blunder of accidentally turning off the air pump and things were great, there was much rejoicing and inappropriate touching of leaves in my garage.
I noticed 4 days ago that the plants started stinking big time and they were coated by an almost invisible layer of resin, not looking like mold or anything - but boy they were sticky and would leave a smell on my hands big time. The stickyness has passed, but today I noticed this crap on one of my plants. I've checked for caterpillars, larvae and mites, nuttin there.
You think this is molding or are these fan leaves just about to quit or wtf is going on? It doesnt look like any of the nute deficiency pics or charts that I have seen. Any input is highly appreciated!

This is my setup:
Grow cab size (covered in mylar from top to bottom, air tight and isolated with 0,4 inch styrofoam)
5 ft height (1,5 foot is used for tech room + propagation room)
1,5 ft depth
3,2 ft in lenght


400 watt MH with cooltube
2 40 watt cfls 6700k (hanging in each ends)
2 240v fans for inlet in bottom of cabinet
1 110 cfm extractor fan with carbon filter
2 diy dwc rubber maids with 3 pots each
4 air stones + Eheim 400 air pump
2 25 watt aquarium water heaters

Temps are between 18-25 degrees Celsius an RH is between 35-50%

My guess is some type of leafminer.

Thx - I have never heard of these buggers. I have read a bit about them now, dont you think the 'mines' are too thick for leaf miners?

pigme sloth's

That was my second guess. Stoned, I take it?

Stoned... yeah I really doubt it

YosemiteSam78 said:

Thx - I have never heard of these buggers. I have read a bit about them now, dont you think the 'mines' are too thick for leaf miners?

Click to expand...

There's a few different kinds. It does seem wider than most though. Definitely looks like a critter though. If you look at the front and back of the leaf under magnification and it doesn't look like the surface is gnawed, then the thing is inside the leaf tissue. Mining away. Hence leafminer. Hell I'm no entomologist it was just my best guess.

Aaaargh, wtf, how the f%#¤ did the fuckers find their way into my garage and into closet. I'm gonna look into it tomorrow and see if I can see anything with my magnifying glass. I guess removing the fan leaves that are infested is my only choice and I need to secure my air inlet i guess.

I really dont think I have a pest issue. I have checked the plants through the mag. glass and it does looks strange, but I dont see 'mines'.
When thinking about how I found this (I turn the plants now and then to give them even lighting as long as they are not near the screen), I wonder if the combination of the blower and this plant being near the mylar wall has to do with it. The mylar surface is kinda sand paper like and I did have a blower very close to it - so perhaps it was just friction against the wall?
It is the plant on the upper right hand corner: