Who told you to use compresed air? I don't think that will help. The problem is the connections between the circuit board and the display glass. These typically use rubber connectors called "zebra strips" because of their alternating layers of black conductive rubber and non-conductive rubber of another color. They rely on pressure to keep the connection. Not enough pressure = no connection = bad design. Someday I will take mine apart and try to fix it but for now it is a "touch panel".

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra