I can’t speak for the effects of dishwasher soap, but here in the office we do the following:
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Use the scraper to scrape out as much resin as possible.
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Use the squirt bottle to squirt IPA into the tank while holding the tank upside down so the IPA can drip out. You don’t want the liquid pooling in the resin tank as it could seep under the silicone, destroying the tank. You can use the scraper to wipe the silicone.
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Place the resin tank upside down on a paper towel to let the IPA drip out and dry.
Hope this helps!
EDIT 10/18/18: Please DO NOT use IPA to clean resin tanks. Gentle scraping with a moist(with water) paper towel is the most that should be done to clean a tank. If you’re still having trouble after that, please contact our support team.
Jory