felts and dampers in an old pianos will become wear and tear, replacement is a good way to treat them. if nothing to be done, you may encounter weird noise and sound due to uneven damped wires, unbalance touch because of worn out felts and skins.
regulation can help however, when the adjustment were off the limit, the scales and touch will become awkward. so call your trustable piano technician to refelt your old piano.
you may surprise there are silver fish inside the piano where felts and clothes are their favourite.
call 0166604478 (darren) to check your piano if you want improvement.