Hi. If you know someone working in medical sector, like a dentist or a nurse at surgery department, you can ask what they use for their material like endoscopic tubes or other clamps. I personnally use WipAnios, wipe clothes used for that purpose in Europe. There is also Steranios ans Hexanios (TM) that need to be diluted to 5% ; you need to follow precisely the recommended timing, otherwise the product begins to be corrosive. I don't know brand names of same kind of products overseas.