I have used a contact cleaner on some of the buttons on my Tyros but I've never used it on the Direct Access or Exit buttons Al.
There are contact cleaners and then there are 'Contact Cleaners'. The one I use is called "Blow Off" and it is among the best in my opinion. I had problems with the Saxaphone Panel button where I had to press harder to get it to engage. After using the "Blow Off" it works much better. Same goes with a couple other buttons that were 'sticking' a bit. It really works wonders and I highly recommend it. It is non-conductive, dries very fast, and it leaves no residue or odor.
What I think happens sometimes is dust gets in the crevices of the buttons and after a prolonged period of build up of dust the button[s] become somewhat un-responsive and it requires more pressure to make the proper contact because of the dust, etc. Blow Off gets rid of the dust, etc., and does a wonderful job of cleaning the electronics and contact points, etc.
Here is the link to "Blow Off" Al:
Blow Off web site Here is the direct link to
Blow Off Best regards,
Mike