I’m a repair shop owner and tech myself and have yet to trigger the tamper detection although I haven’t had to replace the ear speaker. When it comes to liquid damage repair, it’s not very practical as you’d be crazy to try to put a warranty on it. If you are going to be attempting liquid damage repair, you should really have microsoldering equipment. If liquid is stuck between the layers then it’s a problem waiting to happen and then you’ve got an unhappy customer to deal with. I would recover data and if you guys do sell devices, offer them a replacement.