Stove Top Coffee Maker

I made some coffee the same way i've been making it for years and it normally comes out fine but this time it was like drinking water. I figured i'd try it on my stove top perc. The coffee tasted better but it was still weak as hell. This is a fairly new container of coffee. I used it a few times with no problem but now all of the sudden it brews like water. I use a scoop. I normally brew 8 cups and use 4 scoops. I also use an extra strength setting. The coffee maker has been cleaned about 5 times. It has a self cleaning mechanism. It also has a water filter. I don't know if that means anything.
I Keep my coffee in the fridge. I also do everything the same and i am getting different results.