Bubble Thing Big Bubbles Wand and Mix

I struggled to get this to work. I watched a few videos on making bubble solution and several said to use distilled water. As soon as I stopped using our hard tap water, it worked. We made huge bubbles, but I struggled to “close” the bubble. So by the end of our super long bubble it would just pop. This was only the first day messing with it, so I’m hopeful I will get better at it. I also read to add baking powder to the mix and it help lower the ph. Which I guess helps with bubble making. Google has some different recipes I would like to try as well. Glycerin, guar gum, etc.