b-smart

I have 98 gs 300 and have had for 8 yrs now. I'm the 2nd owner. The only problem I've had so far is the ac drain, I think it's clogged bc my interior is getting wet. --what should I do

I think my ac drain is clogged or something...bc my interior is getting wet like crazy whenever I turn on the ac. Does anyone know if I can fix the problem myself or do I have to take it to Lexus...It's a 98 GS300