I have had the ww90t684dlh auto dose washing machine for approximately 6 months now. And the last few washes I’ve done, a message pops up saying detergent low. Every time I check, it’s full. And I have noticed that it’s not adding detergent to the wash. I have checked all the settings are correct and I have taken the drawer out and cleaned it all and inside where the drawer goes but I’m still having the same problem. many advice on how to fix this?