Had the same problem. Phone dropped face down in pool of oil. Quickly wiped off, but speakers to faint. Compressed air did the trick. Blew air onto speaker and seams around the edge. Little pools of oil came out. Wiped clean with a tissue. To avoid moisture issue, as can gets cold condensation occurs in compressed air tube. For each squirt, do a quick spray away from phone until air is dry (1 sec) then re-direct back onto the phone.