Thanks Nick and Martin. It helps to know how the switch disassembly has been done successfully, and that it's worth the effort if/when they become intermittent again. It *is* rewarding, to go against entropy! Even if it causes the occasional gibber. gary

Martin, I feel a little better, I had done much as you describe to clean the switches. With the faceplate off it is possible to position the cleaner spray tube between the white plastic movable pieces and the stationary contacts to flush them all. I started with the LPS brand cleaner (not LTV as I said earlier) which is plain solvent. Later I repeated

Martin, You may be right about how long the switch cleaning lasts, but the persistence of the lubricant makes me optimistic. I don't look forward to having to take the faceplate off every few months to renew the cleaning! Is there any other solution? I don't suppose new replacement switches are available? I'll definitely leave the sliderules

Hi all, I'm refurbishing my 3000-2 after being stored many years. The push switches were intermittent at best or just not working, sliders noisy, and most of the lamps were out. I tried just contact cleaner (LTV) at first which improved the switches somewhat but still not satisfactory. Then I tried contact cleaner plus lubricant from Radio Shack