Improve ventilation by opening windows briefly each day
Use extractor fans in kitchens and bathrooms
Keep indoor humidity low with a dehumidifier
Avoid drying clothes indoors
Maintain a steady indoor temperature
Use trickle vents if available
Wipe away condensation regularly
Insulate windows with double or triple glazing
Seal gaps around windows and frames
Use thermal curtains without blocking airflow
Move furniture away from windows
Reduce indoor moisture sources
Fix leaks and damp problems promptly
Use anti-condensation paint or film
Open curtains and blinds during the day
Keep lids on pans while cooking
Vent tumble dryers outside
Check and improve loft and wall insulation