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!