Christmas tree lights could slow down Wi-Fi speeds, industry regulator Ofcom has warned.
Ofcom claims interference of Wi-Fi signals could also come from devices such as baby monitors and microwaves, all of which an seriously damage connection quality.
The regulator has made the claims amid the release of a new app that can be used to check home broadband speeds.
The app samples wireless signals to see if the flow of data from routers to devices remains uninterrupted.
Ofcom's 2015 Connected Nations report has also unveiled a number of statistics relating to home Wi-Fi, stating there had been "good progress" made on the availability and use of telecoms services.
The report found that just over a quarter (27%) of homes now have a superfast broadband connection (over 30Mbps), up from the 21% recorded for the year before.
However, despite those figures, the watchdog insisted there was "still more to do", pointing out that some 2.4 million UK homes are still unable to access speeds of 10Mbps or more, with most of those homes being in rural areas.