Mattress mold is a problem that sneaks up on you. A slightly whiffy bed and small stains can quickly turn to itching, sneezing and watery eyes. And right now is primetime for moldy conditions.

A combination of cold, wet weather outside and warm heating inside increases moisture in the air. Your mattress soaks it up like a sponge and, trapped inside your warm bed, that damp helps mold spores to multiply.

Mattress mold doesn't have to spell the end of your bed, but you need to catch it early. We spoke to Dr Gareth Nye, Biomedical Sciences lecturer at the University of Salford working exclusively with M&S , about how to identify early signs of mold — and get rid of it.

3 signs of mold in your mattress

Mold can completely ruin a mattress, but before you rush off to browse our best mattress guide for a replacement bed, look out for these early indicators of mold.

1. A bad smell

You won't necessarily see early signs of mold in your mattress, but you might be able to smell the problem has taken hold.

Dr.…