OK, Ron's post about dry air gave me the idea to search out solutions for the opposite problem. We rent a VERY old cottage that was clearly cheaply/improperly re-done some years before we moved in. We have double glazing that wasn't compensated for with damp coursing and as a result it's constantly damp. Actually it's beyond damp - I wipe down the windowsills every morning as they are DRIPPING with condensation (obviously this is only an issue in cold weather) and I have to go on a weekly mould killing spree on some of the outside-facing walls which is not terribly good for our respiratory health (the mould OR the mould killer!)
It's too cold to put fans on or keep the windows open for any length of time, and even when I do open the windows for a while, it doesn't do nearly enough good. I've also bought those moisture collectors and put them on every window sill but they just fill up while the sills continue to drip. We haven't got much disposable income at the moment, especially with Christmas, but has anyone had success with a particular brand of electric de-humidifiers? I actually think we'd have to buy two - one for upstairs and one for downstairs, so I need to find one that works but doesn't cost an arm and a leg....
Or does anyone have any other solutions to damp? I've seen those snake-like things in the Lakeland catalog that you lay along the window sill, but I'm skeptical since the disposable damp catchers that we got at the grocery store haven't solved the problem at all (though they've all filled up - but it's like the windows just produce more water to compensate somehow!)