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Browse credit cards from a variety of issuers to see if there's a better card for you.
If it was your only card with a balance, paying all your cards to $0 will cause a credit score drop.
Is the Experian score an actual FICO score (does it say FICO on it?).
Many of us like leaving a $5 balance to report on the statement of ONE CARD, then paying $5 off after the statement cuts so no interest is charged.
Note that the alert will show you a score and a reason. The reason has nothing to do with the score change, usually.
What else is going on with your report? Did any balances INCREASE? Did you get any CLDs?
Any new inquiries or new accounts posting in the past month?
Double check to make sure your credit limits haven't gone down anywhere.
No new inquiries or new account posting?
It's possible you just moved into a higher scorecard/bucket.
What is your AAoA today, and what is your age of oldest account today?
Well to me that doesn't sound like a scorecard/bucket but I could also be wrong. What's your oldest account (open) on your reports, age-wise?