If your home smells sweet and musty, you are not alone, and it might be time to take a closer look. According to Tony Kantzavelos, a cleaning specialist and CEO of Love Your Rug of Ottawa, animals and insects are among the most common sources of household odours, and two specific smells can point to an infestation.
Carpets and rugs can absorb odours from pets, spills, and moisture over time. Without regular cleaning, these smells can settle into the fibres and may not be removed by vacuuming alone. Kantzavelos says many homeowners only address their carpets once stains or visible dirt appear, by which point deeper problems may already have taken hold.
Cockroach activity
A sweet, musty smell is often the first sign of cockroaches, appearing before homeowners spot the insects themselves. Pest control experts say cockroaches produce distinctive musty or oily odours from their secretions and droppings, particularly when present in large numbers. These scents tend to appear first in kitchens, bathrooms, and food storage areas.
Odour-related pest complaints typically rise in the autumn. Warm early-season days keep insects active, while homes turning on their heating and continuing normal food storage habits create ideal conditions for pests to move indoors. Regular professional carpet and rug cleaning removes food residues that attract cockroaches and eliminates existing odour sources that can sustain infestations.
Rodent activity
An ammonia-like smell usually points to rodents rather than insects, coming from their urine and droppings. As outdoor temperatures fall, mice and rats increasingly move indoors in search of warmth and food, embedding their sharp-smelling urine into carpets and soft furnishings. A reduced number of natural predators in suburban areas has also contributed to rising rodent problems.
Sealing gaps around pipes, doors, and foundations before the first frost is one of the most effective ways to keep rodents out. Once an infestation has been dealt with, professional carpet cleaning can help eliminate lingering odours and sanitise affected areas.
Kantzavelos said: “At the end of the day, a clean home is a healthy home. The smells we notice, sweet, musty, or sharp, are early clues we should not ignore. Address them at the source with regular deep cleaning.”
Taking action
Experts recommend investigating unusual smells promptly rather than relying on air fresheners or surface cleaning, as vacuuming alone rarely reaches residues trapped deep in carpet fibres. Professional cleaning services that include sanitisation can address both odours and their underlying causes. Simple habits, such as storing food in sealed containers, clearing crumbs promptly, and keeping indoor humidity low, can further reduce a property’s appeal to pests.
Autumn is considered a key window for prevention, as changing weather and heating systems create conditions that allow insects and rodents to establish themselves indoors before their numbers grow. Combining pest exclusion with routine deep cleaning of carpets and rugs offers households a practical way to protect their homes through the colder months.