With this comment, you exposed yourself as a former SAM operator.
After my secret was revealed I should say that I learned much more for the SAM's thrue this SIM and comunity, than till my military training...
And about cleaning with spirit (which is due to dust electric conductivity, which could reflects on el. tubes) - the instruction say that "thin layer must be applied"... The instructor ask us - the conscripts - to show him how we apply a thin layer of spirit on and we just put some spiritus on a piece of clean, dry cotton and start cleaning, but when the instructor saw this, he starting to shout "No!No!No! Let me show you how!", and he took up the bottle of spiritus, take a huge swallow and then exhale his breathe on the opened rack and said" That's how must aplly a thin layer!..." and ask for a cucumber..
This is the exact description of the Russian cleaning method...
Hpasp Free SAM Simulator, "Realistic to the Switch" (U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.) http://sites.google.com/site/samsimulator1972/home