I have been using a water based cleaner as a pre-wash in an ultrasonic cleaner to remove the majority of excess resin. I then rinse the part off under a faucet then with my airbrush compressor I dry it off. Lastly I toss the part into a quick ipa dunk and some agitation. The part should not feel slippery. Remove and use the air compressor to dry the ipa so it doesn’t soak into the surface.
I haven’t had any tackiness after this and haven’t had the typical warping or part distortion issues.
Yellow Magic from Bradley Systems is one cleaner used in the Flexo industry and works well on Formlabs Resin here.
I have found the tackiness is raw resin on the part. Water based cleaners won’t typically cross contaminate parts with color, ie: black resin shouldn’t cause a clear part to be hazy. You should be able to recover majority of the cleaner back with a uv light since the resin is coagulated and not dissolved in the solution.
I originally used heated baths but found that room temperature seems to be enough and since the final cleans bath as others suggested works well and is less damaging than a long soak in IPA.
I recently got my printer back because I had some issues with clarity and sharpness of prints along with various failures. They had worked on the galvos and the printer is amazing. i do have a small flare on the laser but it seems to be non issue. Formlabs has a really good support team despite some of the horrors you may read on some of the posts. A real pleasure working with them.