Handy,

First,

Check and make sure the refrigerator is level in both directions(front to back, side to side, a slightly higher front is OK).
Check your freezer temperature, you want an air temperature of 3 to 5 degrees F.
Check and make sure there are no obstructions, or things protruding from the back of the basket(s) keeping the door from closing properly.
Check the front door panel for level(vertically) and check the door seal for tight fit on all sides( top, bottom, sides) with a thick sheet of writing paper or dollar bill(there should be some slight resistance between the door seal and front flange, when you attempt to extract the paper).

As for the drawer slides, you want to remove the baskets, clean up the glide assemblies and walls, then liberally lubricate the metal glide assembly with "food grade" lubricant grease, (vaseline will work in a pinch).

I take for granted the upper fresh food compartment, is OK ?

Good Luck,
:) :) :)

Fredss, without a model number, that's a bit difficult but, in most "bottom mount" drawer freezer refrigerators the upper bins have tabs that align and slip into slots molded into the drawer glides. You grasp the bin in the front area on each side and lift the front up and out at an angle. The lower bin is easiest to remove if you remove the drawer glides first, then slide out as far as possible then lift the bin straight up and off the slide rail and out the opening. Of course, you've emptied the bins first.