 Organic electrochemical transistors based on the conducting polymer poly-3, for ethylenedioxyophen, doped with poly, styronosulfinate, PEDIT, PSS, are of interest for several bioelectronic applications. In this letter, we investigate the changes induced by immersion of PEDIT, PSS films, processed by spin coating from different mixtures in water and other solvents of different polarities. We found that the film thickness decreases upon immersion in polar solvents, while the electrical conductivity remains unchanged. The decrease in film thickness is minimized via the addition of a cross-linking agent to the mixture used for the spin coating of the films. This article was authored by Xiuming Zhang, Prajwal Kumar, Amel Cerenuas, and others.