They were hailed as the must-have energy saving hack for hard up families across the country.
And as the cost of living crisis deepened, struggling households have snapped up air fryers in their hundreds and thousands. But now money saving expert Martin Lewis has some concerning news - it may not always be cheaper to use one of the nifty devices - or even a microwave - than an oven.
The frugal guru's warning comes as many have invested in air fryers from leading brands such as Ninja and Tower - thinking they are more economical than using a traditional cooker.
