A room fogger is the blunt instrument of flea control: rather than treating specific surfaces by hand, you seal the room, set it off, and let it settle everywhere at once — carpet, curtains, skirting boards, the lot.

This twin pack contains two 100ml aerosols, each treating an area Johnson's put at 70 square metres between them, with an Insect Growth Regulator alongside permethrin, s-methoprene and tetramethrin as the active ingredients. It's described as a complete room treatment — place it in the room, press, and leave — and it kills fleas and other insects including ants, cockroaches and earwigs, with protection on carpets, soft furnishings and pet bedding lasting up to 7 months. Johnson's are explicit that it is not for use on animals.

• Twin pack: 2 x 100ml aerosols
• Treats 70 square metres between them
• Contains permethrin, s-methoprene and tetramethrin, plus an Insect Growth Regulator
• Kills fleas and other insects (ants, cockroaches, earwigs)
• Protects carpets, soft furnishings and bedding for up to 7 months
• Not for use on animals

On leaving the room. This is a fogger, not a spot spray — Johnson's instruction is to set it going and leave, which means pets (and people) need to be out of the room while it works and for whatever period the pack states before returning. It is not for use on animals under any circumstances.

Who it's for: owners dealing with a flea problem across a whole room rather than one sofa or one bed, who want a single treatment that reaches carpets, soft furnishings and skirting all at once.