Yes, but be careful when spraying and do this lightly because the propellent can freeze delicate parts.

Also, you can clean the inside of the jack by moistening a Q-Tip (cotten swab) lightly with contact cleaner, then gently wiping the inside the jack to remove oxides and other forms of contaminents.

If the problem persists, there's a good possibility the jack's contacts are worn and the jack must be replaced. I just had one replaced in one of my PSR-3000s with a heavy-duty jack and it cost me about $70 for parts and labor. I had the keyboard back the same day.

Good Luck,

Gary

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Travlin' Easy