Ireland's temperatures are set to tumble as we head into the winter months, meaning many households will have condensation to deal with.
Already some people are struggling to see out of their windows in the mornings due to the dewy manifestation of condensation.
Condensation is water beads that form when hot, moist air meets a cool surface. It manifests on our windows in the colder months due to warm air from inside the home hitting the cold glass windows.
READ MORE: The two most expensive appliances to run in your kitchen - and neither is the oven
While it is mostly harmless, if your windows aren't maintained, the moisture could develop into dangerous mould that can cause health issues like asthma, eczema and bronchitis.
While condensation can form anywhere, many are waking up to find it on their bedroom windows and wondering why.
One person shared her confusion on TikTok, writing: "We always get condensation but only one window in the whole house and always in the morning... it baffles me."
A property expert then shared a video explaining the phenomenon, Mirror UK reports.
Popular TikTok user @ thatpropertyguy said: "A lot of people are saying that they always get condensation on one window in the morning. I guarantee it's going to be your bedroom window."
Going on to explain why this happens, The Property Guy said: "Overnight the moisture from your breath is going to collect on the cold surface of the window," adding that it's worse if you keep your door closed.

The TikToker then demonstrated that it's the same principle when you breathe hot air straight onto the window and a foggy layer of moisture sticks to it.
The Property Guy went on to share some ways to prevent condensation forming in the bedroom. His top tips were to limit it by opening a window, getting a dehumidifier, and leaving your door open.

People took to the comments to share their own tips, with one person saying: "Most windows will have vents at the top or bottom. They should always be open. It allows for passive ventilation and stops condensation."
Another said: "Triple glaze option is best for replacement windows."
A third wrote: "Get some humidity loving plants. It helps."
We have previously shared which plants are best for reducing condensation and mould in the home.
READ NEXT:
- The two most expensive appliances to run in your house have been revealed and neither are the tumble dryer
- Ireland weather: ‘Beast from the East’ could unleash subzero freeze in days as alarm bells sound
- Ronan Keating's daughter Missy lands job in coffee shop after emotional move to Australia
- Irish student Karen Buckley's killer caught after forensics expert caught key missed detail
- Warning issued to Irish Tesco Clubcard owners before vouchers expire in just 7 days
Get breaking news to your inbox by signing up to our newsletter