How often to deep clean: once a year or more frequently?

Deep cleaning in an average home is usually done once or twice a year, most often in spring and before Christmas. However, if pets, young children, an allergy sufferer or smoking are present in the home, it is worthwhile to do a thorough clean approximately once a quarter. It need not always be the entire home: the kitchen, bathroom and bedroom require more thorough cleaning more often than other rooms.

In this article, you will find how to set the right frequency and how to recognise when regular cleaning is no longer sufficient. What exactly deep cleaning entails is described separately in the article What deep cleaning for your home entails and how it differs from regular cleaning.

Starting point: once or twice a year

For a home where one or two adults live, nobody smokes and there is no pet or allergy sufferer, one deep clean per year is a reasonable baseline. Those who want to be thorough can add a second, typically one in spring and one in autumn or before holidays.

The condition is that regular everyday cleaning is maintained between deep cleans: vacuuming, mopping, dusting flat surfaces, cleaning the bathroom and kitchen units. How often to do individual everyday cleaning tasks is discussed in the article How often to clean your home: a guide by rooms and appliances.

As soon as any of the factors below appear in the home, it is wise to shorten the interval. Moreover, the factors combine: a family with children and a dog needs thorough cleaning more often than a couple with a cat.

What increases the frequency

Number of people and flat size

The more people living in a home, the more dirt is brought in from outside, and there is more cooking, laundry and showering. In smaller homes, everything happens in a smaller space, so dust and moisture become concentrated. For a three- to four-person household, it is advisable to plan for two deep cleans per year and, between them, one thorough clean of the kitchen and bathroom.

Pets

Hair and fur settle in upholstery, carpets, under furniture and behind radiators, where regular vacuuming cannot reach. For a dog or cat with significant shedding, a thorough clean at least once a quarter has proven effective, with emphasis on sofas, carpets, pet beds and the floor under furniture.

If you are cleaning in a home with pets, choose products with them in mind and ventilate thoroughly after cleaning. When selecting a product, follow the label and the manufacturer's instructions.

Allergies and asthma

For those with allergies, it is not just about the frequency of deep cleaning, but also about the regularity of certain tasks. The United States Environmental Protection Agency (EPA) in its recommendations on asthma triggers advises washing bed linen once a week in hot water, using dust-proof covers on pillows and mattresses, and vacuuming carpets and upholstered furniture with a HEPA filter vacuum. According to the EPA, people with asthma or allergies should leave the room while vacuuming.

It is therefore advisable to schedule a thorough clean of the bedroom, mattresses, upholstery and textiles approximately once every three months. Detailed instructions can be found in the article Cleaning when allergic to dust mites. If you have medical advice, follow it.

Smoking in the home

According to the EPA, substances from cigarette smoke settle on hard surfaces such as walls, tables and floors, and penetrate clothing, upholstery, curtains, bed linen and carpets. Ventilation and air purification reduce exposure but do not eliminate it.

Where smoking occurs indoors, ventilation alone is not enough. Washable surfaces, windows and textiles should be cleaned thoroughly at least twice a year, preferably quarterly, and smoking should be moved outside.

Young children

Children spend a lot of time on the floor, touch everything and put toys in their mouths. For everyday situations, soap and water are sufficient: the United States CDC recommends regularly cleaning frequently touched surfaces such as light switches, door handles and work surfaces, and using disinfection mainly when someone in the household is ill or has a weakened immune system. Deep cleaning of floors, carpets and the children's room is worthwhile to do approximately quarterly with young children.

Moisture and mould

The State Health Institute points out that temperature, humidity and inadequate ventilation can cause mould and other allergens to grow in homes. The EPA in its guide to mould and moisture recommends maintaining relative humidity below 60%, ideally between 30 and 50%, and states that in the bathroom, better ventilation and more frequent cleaning usually prevent mould from returning.

If windows are condensing in your home or dark spots are appearing in joints and corners, plan more frequent deep cleaning of the bathroom and windows, perhaps every two to three months, and above all address the cause of the moisture.

Overview: indicative frequency by household type

These are indicative values, not a standard. Adjust them according to how quickly dirt accumulates in your home.

Which areas of your home need deep cleaning more often

Deep cleaning need not be one large task. Often it is more practical to split it into parts and clean the most heavily used areas more thoroughly:

• Kitchen: grease on cupboards and tiles, extractor hood, oven, refrigerator and the space behind appliances.
• Bathroom and toilet: joints, silicone sealants, limescale on taps and shower enclosure, drains.
• Bedroom: mattresses, pillows, bedding, dust under the bed and on cupboards.
• Upholstery and carpets: sofas, armchairs and carpets, where dust, hair and odours linger.
• Windows and radiators: frames, windowsills and radiator fins, typically before and after the heating season.

For appliances (extractor hood, dishwasher, washing machine, oven), follow the maintenance interval in the manufacturer's manual. This varies depending on the model and filter type, so a general number does not make sense.

How to tell when regular cleaning is no longer sufficient

Instead of a fixed date in the calendar, you can watch for signs. If two or more of these appear, it is time for deep cleaning:

1. A visible layer of dust is apparent on the tops of cupboards, skirting boards and door frames.
2. Textiles, the sofa or carpet retain odours even after ventilation.
3. Kitchen cabinet doors and tiles feel sticky to the touch.
4. Limescale or dark spots are deposited in joints and on taps.
5. Windows are dull even after normal glass cleaning and frames are dirty.
6. An allergy sufferer in the household experiences more symptoms indoors than outdoors.

How to plan your deep cleaning

Those who want to tackle deep cleaning themselves can spread it over several weekends, room by room. A clear checklist of tasks can be found in the article Deep cleaning your home: a complete room-by-room checklist.

When working with cleaning products, always read the label, wear gloves and ventilate. Never mix chlorine-based products with acids or ammonia, and test a new product on a hidden area first. The CDC explicitly warns that cleaning products should not be combined, as toxic fumes can be produced.

If you would prefer not to tackle the entire home at once, you can order Deep cleaning in Prague with a scope agreed in advance as a one-off or on a regular basis. Indicative scope and prices by flat size can be found on the page How much does deep cleaning cost.