I did have fluid build up under the Tegaderm dressing. To remove the fluid I would smooth the patch down forcing the fluid out the bottom of the patch. I had less issues with fluid build up on wounds I first covered with absorbent non-stick gauze for the first several days. I did not let the fluid collect too long. That was the one aspect of the Tegaderm that is an issue. Even with this, my wounds healed faster and cleaner with Tegaderm. The areas I used New Skin followed by a non-stick gauze dressing still have some scabbing.