Today I decided to dust out my PC. I turned off my PC and unplugged all the cables and everything. When it came to the GPU, I flipped my can upside down to clean out the GPU fan which was a stupid idea. My heart dropped as I noticed this white substance almost like a liquid, which disappeared quickly. I was nervous, thinking I screwed something up. A relative who is a chemical engineer told me that it was just condensation, and to let my PC dry out. Anything else? Is he wrong? What other steps should I do?