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![RonDawson](https://data3.answerbase.com/answerbase/1852/UserFiles/User44682/profileImage44682.jpg?634897245130000000)
Jun 15, 2020 - 09:20 AM
No Demon only lasts a couple of days when left in tap water. The minerals begin to deteriorate it immediately. Once applied, it has a residual of about 60-90 days.
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Jun 15, 2020 - 09:20 AM
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