Asus MS228H

Has been using this monitor since late 2011.
2-3 years ago my niece accidentally drop Coke on it.After that this few strips & black spot shown.Which was much worse back then.Maybe one day it will go away completely.
Here is the complete spec-
Screen Size 21.5"
LED Backlight Yes
Widescreen Yes
Recommended Resolution 1920 x 1080
Viewing Angle 170° (H) / 160° (V)
Pixel Pitch 0.248mm
Display Colors 16.7 Million
Brightness 250 cd/m2
Contrast Ratio 10000000 :1 (ASCR)
Response Time 2ms(GTG)
Horizontal Refresh Rate 30 - 83 KHz
Vertical Refresh Rate 55 - 75 Hz
Connectivity
Input Video Compatibility Analog RGB, Digital
Connectors D-Sub, HDMI
D-Sub 1
DVI No
HDMI 1
Convenience
User Controls:
SPLENDID Video Preset Mode Selection
Auto. Adjustment
Brightness Adjustment
Contrast Adjustment
Input Selection
Regulatory Approvals UL/cUL, CB, CE, FCC, CCC, BSMI, Gost-R, C-Tick, MEPS, VCCI, PSE, J-MOSS, PSB,China Energy Label ,RoHS, WEEE, WHQL
Stand Adjustments Tilt
Built-in TV Tuner No
Built-in Speakers No
HDCP Support Yes
Features:
Glossy Piano-Black Bezel
Ultra-slim 16.5mm Profile
Ring Stand with Ergo-Fit Technology
LED Touch-Sensor Buttons
Cool Star Blue Rear Bezel
Trace Free Technology
SPLENDID Video Intelligence Technology
SPLENDID Video Preset Modes (5 modes)
Skin-Tone Selection (3 mode)
Color Temperature Selection(5 modes)