Don’t assume you have naturally oily skin just because it appears shinier than you would like. You might just be using the wrong product.  It’s possible that the moisturizer you are using is too heavy. When you use a product that is too rich for your skin, your pores can’t absorb it. As a result, the product sits on your skin, potentially clogging your pores. Conversely, you might actually be using a product that is too harsh and drying. Your skin compensates for these products by producing more oil. Stick to gentle cleansers and light, oil-free moisturizers for a few weeks to see how your skin reacts. All people have natural oils in their skin, but this does not mean that everyone should use products developed for oily skin. Once you have ruled out products as the culprit, consider the following when determining where you stand:  If your skin is oily throughout the day and you have large pores all over your face, you probably have oily skin. If oily skin and large pores exist only in your T-zone (the forehead, nose, and chin), you probably have combination skin. If you only see oily skin in your T-zone when the weather is warm, you probably have normal skin. If your skin is oily but your pores are small, it’s a good sign that your products, and not your skin type, might be to blame. Wash your face with a gentle cleanser, and don’t put anything on top of it. In an hour or two, blot with a tissue. If you see greasy splotches, your skin is probably oily. If not, you probably have combination skin. If you determine that your skin is not really oily, look for a moisturizer for normal skin. On the other hand, if you have truly oily skin, look to Part 2 for help choosing the right product.

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Write a summary of the previous text in Indonesian:
Singkirkan produk bermasalah. Perhatikan di bagian wajah mana dan kapan saat kulit berminyak. Lakukan tes menggunakan tisu. Tentukan tindakan.