Although all rooms should be well ventilated by air bricks/grids, you can't always keep the windows open on a cold & frosty day pinus - unless you wear Eskimo clothing indoors!
Norma, have you got double glazing? If so, you should really get in touch with the installer. If not, perhaps you should look to see if your air bricks/vents are not covered over. Hope this helps.
you can get small packets of salt cystals which you place inside your double glazzing which obsorbe condensation. you normal find they come with lenes and telescopes. hope this helps
if you have double glazing these crystals would have been put in before the sealed unit was sealed.you could replace the sealed unit but dont even try pulling it apart?have you got a cooker hood.
Apart from ventilation (major cause), do you have a gas fire in the room? One of the main residues of a gas fire is water vapour which will contribute to condensation.
when you cook veg, or anything else in water,put a lid on the pan, don't dry clothes indoors, ventilate bathrooms after use if its too cold to keep a window open during, air out the house as often as possible. Basically try to reduce generation of water vapour in the house as much as poss.
If all else fails and you're still steamed up, and simply want to be able to see out the windows, then take a damp cloth, smear it with a spot of washing up liquid, and wipe over the windows.