### Curtains and Carpets Curtains act as a filter — they collect dust and odors. They should be washed once a year. Carpets also require deep cleaning: only professional dry cleaning removes dirt from deep within the fibers. ### Mattress Over time, it accumulates dust, micro-particles of skin, and dust mites. It needs to be vacuumed, treated, and flipped once a year — this is important for hygiene and for supporting the back. ### Space Behind Appliances Dirt accumulates behind the refrigerator, stove, and washing machine for years. This overloads the appliances and can lead to breakdowns. Annual cleaning helps avoid unnecessary expenses. ### Windows and Frames Washing only the glass is not enough. Dirt in the frames and seals can disrupt the airtightness and lead to drafts. ### Ventilation Clogged ventilation openings mean not only dust but also a fire risk. Cleaning once a year increases safety and reduces the load on appliances. General cleaning should not turn into a marathon. Dedicating one day a year to each area is enough — and the home will be cleaner, appliances will last longer, and the air will become noticeably fresher.