ADS1299: Reducing BIAS sensitivity to electrode contact quality

Part Number: ADS1299

Tool/software:

Hi,

We are applying DC  BIAS voltage to the human body via a dry electrode.

Due to the unstable nature of the connection it is very sensitive to movement and partial adhesion (such as hair)

The result is a variable DC offset shown in the picked-up signals.

My question is: What methods can be apply to reduce this sensitivity. is there a point in adding another buffer to output the BIAS (maybe higher gain?)?