![Has anyone had these stains before? Any ideas on how to remove before I take it to have it checked? I tried soap/water and isopropyl alcohol with no luck. Any tips are Has anyone had these stains before? Any ideas on how to remove before I take it to have it checked? I tried soap/water and isopropyl alcohol with no luck. Any tips are](https://preview.redd.it/2fxeswc092t71.jpg?width=640&crop=smart&auto=webp&s=5c1c0836f3db91faf0e1f095488bde8eb96a0d3f)
Has anyone had these stains before? Any ideas on how to remove before I take it to have it checked? I tried soap/water and isopropyl alcohol with no luck. Any tips are
Place a sample of tap water on a clean watch glass and place it over a beaker containing water, as shown in Tap water - Sarthaks eConnect | Largest Online Education Community
![Has anyone had these stains before? Any ideas on how to remove before I take it to have it checked? I tried soap/water and isopropyl alcohol with no luck. Any tips are Has anyone had these stains before? Any ideas on how to remove before I take it to have it checked? I tried soap/water and isopropyl alcohol with no luck. Any tips are](https://preview.redd.it/u3v3pyc092t71.jpg?width=640&crop=smart&auto=webp&s=644ace0fad208b181d1f32afa379b21105250ddf)