I think this is the real question... it can take them a number of weeks after maturing to make their first sperm web and they do lose vitality/stop making them completely after a while. Any clue on the date of your male's ultimate molt? How long have you had it? If you bought it mature, then perhaps it already loaded its palps under the previous owner's care?How long has he been mature? MMs live longer than their ability to produce sperm webs. So if he's already been mature for several months, he might already be 'past his prime'.