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one thing you might try is to use Heptane as a solvent instead of lighter fluid. The 2 chemicals (lighter fluid (Naphtha) is predominantly Octane) are very similar, the main difference is that Heptane evaporates faster, so it might not leave as much liquid behind helping the remaining oils migrate. Heptane is available in spray cans; the one I have is "Turner Electronic Parts Cleaner" from Radio Shack. I don't think it's available as an unpressurized liquid. I haven't experimented with Heptane enough to confirm that it is as safe with plastics as lighter fluid, but it is likely to be safer than other solvents, so look for "Contains Heptane" on the label. This is probably not a concern in the shutter in any case. |