There is a leak somewhere, take a squirt bottle of soapy water or snoap if you're feelin' spendy, a plumber would have this...squirt the areas of a suspected leak and watch for the bubbles...you'll know what to replace, then~
Right on Judge. The name is Snoop and I know of it because they used it where I worked. There are probably other brands. Here's what it looks like on Amazon: http://www.amazon.com/Snoop-Leak-Detector-747-8OZ-SNOOP- Category/dp/B002N2T3QK
where might an inspector begin, the bladders themselves do not generally leak, so fittings or anything liable to vibrate, jiggle around unsupported crack at the fitting or intersection of bladder and containment~
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