Can't help, I'm afraid, as my feet are in good condition.
DO you use a moisturiser for them? I use Flexitol Heel Balm, which is available from most pharmacies, and is recommended for diabetic foot care. In your place I would also discuss the dressing problem with your pharmacist. S/he will know what is available and should be able to suggest good alternatives. Or your practice nurse may be able to help.
There are various insoles available to make feet more comfortable, including ones with a gel filling which used to be advertised on here somewhere.
Sorry I can't help further. Let us know how you get on.
Viv 8)