AC stop working after winter..?

You should get it charged

 

You have a 2005? It's now 2025

It doesn't evaporate. You probably have a slow leak. When you get it recharged, hopefully it'll get tested for leaks

 

ACs run in winter during defrost cycles.

ACs don't "use" or "evaporate" refrigerant. If it's low or empty it has a leak. Low (a small leak) sometimes responses to a top off charge but empty usually means a big leak which needs repair, vacuum, refrigerant oil and then refrigerant.

There are multiple o ring seals in an auto ac that can leak as well as the inside evaporator coil.

The condenser coil in front of the radiator can be damaged by a rock.

 

Yeah you can put the dye in it or you can hook up your air compressor if you have one on like 20 lb and pump some air through it and you'll hear it hissing out where it's coming from maybe you'll be able to locate it quickly like that or you can put the dye in it and have it spray all over the place and I imagine you see that for sure if it's a leak in the condenser in front of the radiator usually you can spot those pretty quickly just getting you some access to it take the front bumper cover off and have a look I mean something had to hit it a screwdriver got stuck in it something