New iPhone 14 - “Yellow Dirt” in charging port

I bought my new iPhone 14 last Saturday. On Sunday, I discovered “Yellow dirt” in my phone charging port. I tried cautiously using a toothpick to remove it but it won’t go away (looks dry and hard to remove). The charging port works perfectly fine. Should I be worried about this? Anyone knows what it is? (This “dirt” messes with my OCD). I didn’t put the phone in dirty pockets or places so the “dirt” must been there since the phone was still packaged in its box. Any help would be appreciated. Many thanks!