Water Meter Reading 9.5???? 5 days haven't watered (HELP)

I watered my plant with 2 x 20oz cups of water on 2/19, I watered till it leaked out the bottom.
Now 2/24 my soil moisture meter still reads that my soils at a 9.5
I bought my meter at Home Depot, they only had one electric one.

When should I water it?
What numbers work best to wait tell?

Thanks guys