It does take some practice to make sure you're not seeing light bouncing off triches, and to see that they are clouding up. At the same time, you will notice that the heads get much fatter and bulging. The more you look at them, the more you learn about how to see them. I still have to go back again and again sometimes, like my eyes need time to adjust to what they're seeing in the tiny loupe.
And the process is gradual, you will always see some clear, but I look for mostly cloudy and I look to see if the triche heads are bulging. I also make sure that almost all the pistils have turned brown.
Glad you like it!! These triple loupes are the real deal, unlike all that cheap crap from China.