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I bought a bubble hose to attach to a washing machine. I tried things like: ・Checking if there was a difference with water using a laser ・Can I remove permanent marker ・Will the stain removal change after washing? Sales pages for the products I used (including Amazon Associate links) 1. Arromic Silky Nano Bubble Hose Japanet https://www.japanet.co.jp/shopping/in... 2. Sanei Ultra Fine Bubble Adapter Amazon https://amzn.to/3AEHXdV Laser Module Amazon https://amzn.to/4dHR5gc Nano Bubbles (video posted in the past) Amazon https://amzn.to/4dRT69s Music: BGMer http://bgmer.net