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Cleaning Tool Sanitation — Prevent Cross-House Mold Transfer
Likely causes
Tech tools = unwitting carrier of mold/bacteria
Check: **Transfer paths**: ① Brushes/nozzles = directly carry mold from heavy house to next. ② Sprayer nozzle = mixes alkaline/neutral cleaner with mold → next house's coil. ③ Vacuum = sucks mold, exhausts in next house (no HEPA). ④ Workwear/gloves = droplet attach. ⑤ Tools in warm vehicle = mold growth ON. **Research (Korea 2024)**: cleaning tools = avg detection of '5 previous houses' mold. User reports 'smell seems from another house' = trust signal.
What to do: **7-step hygiene**: ① **1 sprayer per house** = empty after, fresh cleaner per house (or UV-sanitize same bottle each house). ② **Brush 70% alcohol 30 min soak** between houses. ③ **HEPA vacuum** (filter every 6 mo). ④ **Daily uniform wash 60°C+** (mold kill temp). ⑤ **Gloves** = latex/nitrile single-use, one box per house. ⑥ **Vehicle UV sterilizer** (USB 5W, 30 min auto, ₩50k) on tool box. ⑦ **User demo** = 'starting with fresh sprayer, tools sanitized' = trust +50%.
Korea MOE 'Air Conditioner Hygiene Guideline' (2024) = mandatory tool sanitation on regular checks; violation → business suspension. Issue 'hygiene management certificate' to user (trust + dispute prevention). Tool sanitation cost = include in install/clean rate (₩5-10k margin). Elderly/immunocompromised (diabetes/cancer) = hygiene priority = can charge extra. Korea allergic households = 30%; pre-season allergy-clean package is popular.
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