Ireland is currently engulfed in an Arctic freeze with subzero temperatures and wintry falls of sleet, hail and snow affecting much of the country in recent days.
This can mean many households have condensation on windows to deal with.
Condensation is water beads that form when hot, moist air meets a cool surface. It manifests on windows in the colder months due to warm air from inside the home hitting the cold glass windows.
READ MORE: Ireland in for dramatic weather change as Met Eireann forecast 20C temperature swing
While it is mostly harmless, if windows aren't maintained, the moisture could develop into dangerous mould that can cause health issues like asthma, eczema and bronchitis.
One plumber recently took to TikTok to explain the main reason homes get condensation - and the best ways to avoid it.
The expert from Verified by Expert Trades says condensation could be due to poor ventilation, Mirror UK reports.
He said: "It occurs when we've got a warm atmosphere touching cold atmosphere. Those warm water droplets or water vapour will stick to that cold surface and then it condenses, turning into water, as such. And then you'll have puddles on your windowsill."
The "key" to stopping condensation is improving ventilation in your home, he said.
Filming from inside a property, the plumber shows some tips that could help prevent condensation. He said: "We're lucky here, we've got brand new windows and they've got things called trickle vents on. You can leave these open so you've not going to have that massive contrast in temperatures."
For those living in an older property, the expert recommends opening windows slightly if there's a latch lock to keep air coming in.
He added: "That's going to do the exact same thing as a trickle vent."
Lastly, the expert says if you've got an extraction fan, for example in the bathroom, that could do the trick. He added: "If you've already got one, clean it. That's one of the big things. They do get full of dust and dirt.
"Can you upgrade to a more powerful one? If you're got one in the ceiling, your fan will be in the loft somewhere, which will vent out to another place. How long is that run? Can we make that run shorter of flexible pipe so it's got a free flow of air going to it."
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