Northern lights x big bud

Made a mistake with the diary week 4 is 3, week 5 is 4 and this week called week 3 is actually 5. Another good week this week more growth from the lady. All secondary branches have been topped now and recovered nicely. I noticed small amounts of mould starting to grow on top of my coco so I've got a fan at soil height now and it had dried the top already. I have the problem of my soil not drying though. This plant hasnt been watered in a week and my meter is telling me the soil is still wet+. Any suggestions would be appreciated as I'd looks to test some run off for ppm levels