M1 Macbook Air 2020 Charging Ridiculously Slow

My MacBook doesn't really charge. When it's plugged in, it only charges 1% per day. Yes, you read that correctly, 1% per day. To keep using it, I have to keep it plugged in at all times. When I go to Battery Preferences, it says it will be fully charged in over 20 hours. This is strange as it used to be fully charged in a little under 3 hours. I ran a System Diagnostics and no issues were reported. Also, I've unplugged the charger, restarted the computer and plugged it in again but the issue continues. Also, on CoconutBattery it says charging with 0.11 watts even though I'm using the standard 30W charger that came with the computer. Hoping someone can help me resolve this issue.