Each morning, pull back bed covers to allow moisture to escape. Open a window to allow moisture to escape from the room.
Open curtains and blinds during the day to allow air to circulate around all parts of the room and prevent moisture from being trapped around windows.
Use your bathroom / kitchen extractor fan when bathing or cooking. Clean the bathroom extractor with a damp cloth, removing fluff that might reduce efficiency. Clean the kitchen extractor by removing the cover and washing in a solution of washing-up liquid.
If you dry wet clothes indoors, place them on a clothes horse (not a radiator) near an open window or in a room with an extractor fan.
Dehumidifiers reduce humidity levels by sucking in air from the room, removing moisture, then blowing it back out, adding warmth in the process. Portable humidifier can be deployed where needed.
Source: Item in Good Housekeeping, April 2019