Why is the weather forecast bottle made by myself very turbid?

Everything is easy to find except camphor. In the chemical reagent shop, buy all the materials (except camphor). It's impossible without camphor. I wanted to go to the supermarket to see if mothballs could be replaced, but I found that the content of camphor in mothballs reached 94%. So ... . This is it! This is what items and tools are needed after potassium nitrate and ammonium chloride are dissolved in distilled water and camphor is dissolved in ethanol for one day.

To sum up, it is better to buy pure camphor. 6% of the impurities in the moth balls sold in the supermarket can be seen, and the sediment greatly affects the appearance. When camphor dissolves ethanol, it's best to cover it, because ethanol is very volatile. Buy any bottle. However, the capacity is selected and then adjusted in a proper proportion, but the sealing performance is better. Recently, it's sunny at home, so I can't see the change of crystal in the bottle on cloudy or snowy days for the time being. Just give the bottle away, and it makes sense to make it yourself.