Linesman, collectors, sparkles etc... what's the nastiest, dirtiest or grossest light that you've had to deal with?

Basically all east german lights made by VEB Leuchtenbau Leipzig with fibre glass housing are the most nastiest fittings i had ever dealt with.

 A few years ago , I exhumed some of my collection from the back of my carport . Since the carport had an open front , it was frequented by many forms of critters who made nests in the lights AND used them as a bathroom !! YUK !!! https://www.lighting-gallery.net/gallery/displayimage.php?album=5198&pos=268&pid=163709 Most of them got powerwashed with HOT water using a LOT of bleach !

I would say my OV-15 Silverliner which served for 60+ years D2D without any sort of internal cleaning throughout its lifetime. YUCK! 

I'm a industrial electrician , so I see quite a lot of bad condition equipment in service. Severely dirty lamps is common, severely corroded lamps are also very common!

One thing that is pretty impressive is at work, some fluorescent fixtures are so rotten that they barely stay together. And to top it off,they're covered in mud and heavy moist dust. Somehow they still work despite that!

There are also some nice examples of extremely disgusting lamps with spider webs all over them, and oil that has leaked all over and into them. I'm surprised it isn't causing ground faults! Short circuited ballasts causing the tubes to instantly blow up if you try relamping some fixtures is also common, and they leak greenish tinted oil from their capacitors, and thick tar from their ballast!

I see a lot of crazy things daily, but I almost always forget to take photos of it.