Every time I make a smoothie liquid leaks into the base of the blender? What should I do?

The blades may not be turning because the blade assembly is not fully tightened onto the blender bottle. Another reason could be that you are not putting the blender bottle and blade assembly into the blender base in the proper way. For more answers visit the Oster Blend-N-Go My Blend troubleshooting page: Oster Blend-N-Go My Blend Troubleshooting