What the hell are those green sparks?

I bought this budget hairdryer a few months ago, after the previous one took fire. Is this one going to follow as well?

It is running at full speed, sparks are present no matter if heat is turned on or not.

I'm getting deep into the yogurt rabbit hole. Last time I tried I sued for poor starting culture that was heavily infested with yeast. It was some delicious yogurt I bought from a lady on the street, but after a week or so it turned too sour and definitely gassy. It was not a good starting culture...

This time, I switched for some commercial yogurt and also went for this technique with extra water to retain heat for longer. I also finally decided to invest 4 euros and get a cooking thermometer. I'm so satisfied it's keeping in the range of 41/42 degrees Celsius.

I'll give it a night to rest, and I'll let you know tomorrow morning!

Edit: Alright, after 8 hours, the temperature dropped at 31°C. Perfect taste and smooth texture! Pretty satisfied with the result! From now on I'm using this technique with a larger pot filled with hot water.

Hi folks, I live in northern Africa and it is quite common to find ladies on the side of the street selling bottles of fermented milk. I thought this is some kind of yogurt or kefir, but I'm not sure. I bought a bottle of what basically seems to be milk. Also, I'm not sure about those little yellow grains floating around. The smell is quite tangy. What is this in your opinion?