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玄関タイルの洗浄をおこなってきました。
少し前にエアコンクリーニングに行った際に玄関のタイルの黒い汚れが落ちるか？聞かれたのでタイルを2枚ほどテスト洗浄して完璧ではないですが、これぐらい落ちますと説明したうえで実施することになりました。
一見、黒いのでカビ的なものかな？と思いカビ取り剤でテストするも全く落ちず、酸性洗剤を塗布してパッドで擦り落としていきます。一通り終えたらタイルの間の目地部分の黒ずみを高圧洗浄で落として完了しました。
黒ずみの酷いところの上には植物がありますので実や樹液が落ちた長年の蓄積した汚れかなと思いますが実際のところよくわかりませんでした。
