Chosen Solution

I spilled pepsi on my iPhone 5c and at first, it would charge with my original charger but now, it won’t charge at all.

Well, it’s likely just your battery. You need to take it apart, clean it with 90 proof, or higher, isopropyl alcohol, and replace a new battery. It’s possible more things have been damaged. But, let’s not get ahead of ourselves at first Here’s labor iPhone 5c Battery Replacement Clean the entire logic board, after you get the battery out Here’s parts iPhone 5c Battery