Be careful cleaning mica, it has a very thin lacquer to give it gloss. I wax the mica on my Mullen guitar with Simoniz car wax, (gold tin), I think it helps to protect the mica. I use Tri-Flow teflon lubricant which is very expensive for the mechanics.
I have just bought a cheap oil pen from Amazon, (£5) removed the oil inside and filled it up with Tri-Flow. The hole in the application needle is too large and can leak Tri-Flow so I stuck a sewing needle inside the oil pen needle applicator which gives me a very precise cheap oil pen!
https://www.amazon.co.uk/gp/product/B00 ... UTF8&psc=1 MODELCRAFT PRECISION LUBRICATOR. There is a aluminium oil pen on sale with a push down button, it does not work with Tri-Flow because the oil is very thin and leaks out! Charles