Quote Originally Posted by Mossdog View Post
Recently, all three of my Silva compasses have developed small air bubbles, effectively simultaneously. They range in age from about 10 years to a couple of years old. They've been kept in rucksacks and bumbags hanging in my garage, which doesn't get particularly cold or hot, so I'm a bit flummoxed (and peed off) as to why this has happened. They're still usable for now, but if the bubbles get worse (and I've no idea what caused the air to enter the needle housing) there's the expense of replacement. We'll see.

Does anyone else have experience of this? Quick internet search doesn't suggest any real remedies either.
no remedy..they are dead and will get more so.. they are a sealed unit so once air gets in it will only get worse. its usually caused by the main housing being compressed in a rucksack or pocket, when released air is sucked in.
when you get higher the bubble will expand, small bubbles you can get away with but it will soon effect the needle stability.

bite the bullet and go to Dash4it.co.uk...