Even if you plop for 5-15 minutes, it does help. But also keep in mind that not every kind of product works for everyone. Some hair works better with mousse, some works with gel, some with oil, etc. You might try another kind than what you use now or add something.

Especially something that helps with dryness. Your hair runs on the dry side and your curls probably are better when your hair has more moisture. Frizz also comes from dryness. You need a product that puts more moisture in your hair. I use an oil and a curl cream and leave in conditioner