Fact Recommendation

I'm currently using pressed powder to control oiliness. When I see people applying makeup on the subway, their skin texture is so good, and they use pressed powder as the final step, but I use it to cover up oil. I want to use expensive products, but I've mainly used products with good value for money. Specifically, Etude products. When I use powder and pressed powder together, my skin tends to clump and look cakey. Is there a way to prevent clumping?