Marko,
I now there are real "He-Man" types here who'll shoot 500 rounds through their pistols in one range session, but in truth, it's neither necessary or wise. Any time you start getting into micro-pistol categories, you increase the need to have proper physical mechanics for reliability. This is the greatest reason the XD-S had and still has a reputation for being finicky. It is. But it requires dedicated and experienced shooters to make it sing and all others, may experience problems.
I'm a firm believer that this gun is not meant to be a "repel all boarders" pistol designed for the fortress walls during a zombie apocalypse. It's meant as a dependable and accurate defensive firearm that should take care of any and all social issues its owner finds himself or herself embroiled in.
I think a gun should have 2 to 300 trouble free rounds fired through it before it's holstered for defensive purposes. But not all fired at the same time!
My suggestion is to fire 3 or 4 magazines and put it away clean. Do this every time you have a range session and I'd bet you'll find it far more reliable. I fired a few more rounds than normal for me the other day, and found that by the 50th round, my palm and fingers were getting a bit sore. Also, I noticed a bit of wrist soreness from the torque. (My load is 225 grains at about 880 fps which is hotter than ball). It's a kicker of a load in this little killer.
People who try to break in the gun all in the first session are the one's who most complain of malfunctions. Neither my gun nor my son-in-law's XD-S have experienced any difficulties, and we keep our range sessions to 50 or less rounds per. Then we dig out other guns and have fun.