If your wheels are getting stuck, you should check to see if any debris is caught in them. If all the wheels seem clear, it may be that one or more wheels are damaged. If this is the case, try and identify which wheel or wheels are giving you trouble. You can then replace the damaged wheels using the Wheel Replacement Guide for specific instruction.
If your stroller isn’t folding correctly, first make sure the seat isn’t getting jammed during the folding process. If the seat isn’t the problem, you may want to refer to the Free-Stand Button Replacement Guide for additional help. The problem may be an internal malfunction that is relatively easy to fix.