i need to recharge my air conditioning but noticed one of the hoses coming from the ac compressor looks like ******..
should i be worried

 

I'd let the Lexus dealer or a Lexus dealer alternative independent shop look at it. They can find out if that line is leaking. Sound's like it may be leaking.

If the AC blows cold now, and compressor kicks in the freon can't be leaking that much.