If your Enobio / Starstim has a Bent Pin you are likely to have high impedances / noise in at least one channel.
If the bent pin is one of the references, you will have high impedances / noise in all channels.
If that is the case, please take a picture to the connector where the bent pin is, and refer to the next link in order to schedule a repair: https://supportne.freshdesk.com/a/solutions/articles/35000315847/edit