After sitting for a week first layer won't adhere
If your having first layer adhesion issues:
Please try one (or more) of the following (Start with #1), and remember that all of them are equally important!

Make sure your bed is level (Maybe use a leaving stick (or whatever those bubble things are called))

Be sure the bed is clean (I recommend glass cleaner 1-3 squirts and then a light scrub of a paper towel)

Change the temperature of your heated bed (50 - 60 °C)

Check your nozzle height (.15 - .25 mm is what I use)

Lastly, use bed adhesion. Start with painter's tape (least damaging, easy to remove), then use a glue stick or even hair spray if necessary.