Filled Compass

How do you prevent the formation of bubbles in a liquid filled compass?

I have owned liquid-filled compasses long time. 1: What makes the bubbles form? 2: How do I get rid of the bubble? 3: What makes you no compass bubbles?

The bubbles form when the compass is not well sealed. The moist air gets inside. In cold weather, moisture condenses on the glass. You can get rid of bubbles by storing in a dry compass, for example in a box containing silica gel. the air in the box will be very dry, so moisture compass is off. If you want to dry immediately, rub and heat the glass or hot air heating on it. However, the moisture condenses immediately when it's cold again. Sorry, that was dry type. For liquid filled compass light liquid inside the compass. (maybe silicon oil)

Filled Compass

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