my compressor right now is moisting/prespiring when my aircon is turned on..a friend of mine told me that it shouldnt be the case..dapat daw ang nagpapawis lang ay yun linya/tubo papasok ng unit & not the compressor itself..i've also noticed that the coolness of my aircon wasnt been the same as it was..btw my aircon was just been cleaned last month.
my question is - a) is it normal for a compressor to moist/prespire ?? b) if not what could been the culprit?? c) what are the parts of my a/c that is need to be monitored??

my ride is a mits-advie

tia..all you inputs will be appreciated