Moisture in the air forms condensation when it comes into contact with cold surfaces such as windows. There are some simple steps you can take to minimise a build-up of condensation in your home:-
Improve ventilation by opening windows when cooking, bathing or drying clothes;
If possible, hang clothes outside to dry, rather than on radiators;
Regularly clear your windows of condensation so it doesn't cause damage or develop into mould;
Ensure your home is sufficiently heated;
Use extractor fans where available;
Keep a gap between furniture and walls to increase air circulation.