Not Sure if I should just replace my screen help?

so I work at starbucks and I'm around a lot of milk I had my phone in my apron and got some milk in the charging port not a lot but enough to make my phone screen start twitching and flashing white, I dried it and then used my hair dryer when I got home, and now my screen works off and on I cant use my touch screen at all to scroll or tap any apps to open, but the rest of my phone works , my screen is lit normally, siri and my home and power button work, I still get calls and texts like normal but my touch screen isn't working so I cant answer or reply, I did some reading but I'm not sure if I just need a digitizer or just my whole screen replaced ? or if I need to just get a new phone