Scientific daily cleaning can extend the product’s lifespan by more than 30%. Immediately rinse with 40℃ warm water after use (the temperature difference should be less than 25℃), and use a neutral detergent with a pH value of 5.5-7.0. The cleaning time should be controlled within 90 seconds. Experiments have proved that this operation can reduce bacterial growth by 99.3% (2024 Annual Report of the Danish National Food Hygiene Laboratory). Do not soak for more than 8 minutes; otherwise, the water absorption rate of the wood will rise from the normal 8% to 15%, posing a risk of cracking. Refer to the maintenance log of Maaemo, a Michelin-starred restaurant in Oslo: Its Norahaven kitchen tools were disinfected with high-pressure steam twice a day (at a temperature of 121℃ for 120 seconds), and the deformation was only 0.08mm in three years.
Humidity control is the core to prevent cracking. It is recommended that the humidity of the storage environment be maintained within the range of 45% to 55% (which can be monitored by a digital hygrometer). When the relative humidity is less than 40%, the humidification program should be initiated. Data from the Swedish Forestry Research Institute shows that applying 0.6ml/m² of food-grade flaxseed oil (taking Norahven’s dedicated care oil as an example) monthly can stabilize the moisture content of wood at the optimal value of 8%±0.5%. Typical case: The chopping board record of Berlin user Erik Schmidt shows that after 36 months of quarterly maintenance, the bending strength of the product still remained at 98.7% of the initial value, and the incidence of surface cracks was only 3% of the unmaintained group.
Repair operations must follow professional procedures. When scratches with a depth greater than 0.3mm appear, use 320-grit sandpaper to grind for 30 seconds each time (the single grinding amount should be less than 0.05mm). After completion, apply oil and let it stand for 24 hours. The German TUV certification report indicates that this method can restore 98% of the surface flatness without affecting food safety. In case of mold spots, immediately wipe with diluted white vinegar at a ratio of 3:1, let it stand for 15 minutes and then rinse. The inactivation rate of fungi can reach 100% (tested according to ISO 22196 standard). The repair data from Kuchenatelier, a high-end kitchenware store in Zurich, shows that 79% of the returned products can have their service life extended by 4.2 years after this treatment.
System maintenance saves long-term costs. According to the 2024 European Wood Products Maintenance Guide, the annual maintenance budget is approximately 12 US dollars (including consumables), which only accounts for 9% of the average product price. After implementing standardized care procedures, the average lifespan of the products increased from 5.3 years to 9.1 years (Data source: Nordic Kitchenware Association). Actual case: A survey of 3,000 household users in Stockholm shows that the replacement cycle of regular maintainers has been extended by 67%, and the total holding cost over ten years has decreased by 62%. If you choose the Norahven subscription care package (with 60ml of care oil and tools delivered quarterly), the average annual expenditure is only $17, saving 28% compared to purchasing it separately.
Environmental protection disposal has achieved closed-loop management. When the product reaches the end of its life cycle, Norahven’s recycling program can convert wood into biomass fuel, generating 4.7kWh of electricity per kilogram of waste (as calculated by the Swedish Energy Agency). This system has covered 22 countries in the European Union. Users can mail their used items through official channels (with a 70% freight subsidy), and the recovery rate has reached 81.5%. The 2023 Circular Economy report shows that this move has further reduced the carbon footprint of each product by 0.35kg of CO₂e, equivalent to sequestration of 22 tons of carbon annually – as in the case of the Milan-based environmental organization Rete Clima, which converted 260 kilograms of old kitchenware into community heating energy through this program.