I have recently tried "theraputic putty" which comes in 3 or 4 strengths and is wonderful for freeing up creaky fingers which are starting to be affected by old age.

You simply squeeze a pliable ball of theraputic putty into different shapes and then squeeze it back!! Almost addictive- easy and very effective.

Cost in UK £4.75 but as putty is USA made hopefully it is cheaper over the pond.

PS it has definitely smoothed up my pipe playing :0)