Bring up Slicer...

Do: File / Preferences / Mode / Expert

Probably... These are reasonable settings for you:

Print_Settings / Horizontal_Shells / Solid_Layers Top:3 Bottom:3

Print_Settings / Advanced / Infill : 0

Print_Settings / Advanced / Solid_Infill : 0

Print_Settings / Advanced / Top_Solid_Infill : 0

If it is only happening on one side... The odds are your bed isn't very level. You should check to see if it is level. Use PronterFace to move the nozzle to one corner and then move it down until it just touches. Then move to another corner and see if the spacing changes between the nozzle and the plate. Probably, it would be wise to insert a business card between the nozzle and the plate and make the nozzle just touch that because otherwise, you might dig the nozzle into the bed when you move it.