Oh angular cheilitis is such an annoying infection, It never seems to want to go away, actually theres afew websites online that give out a cure I used the remedy at cheilitis treatment and it got rid of mine in a few hours, theres others out there,
Other things you can try to minimize this is to soak dentures in a solution of 1 part bleach to 9 parts water overnight if your a denture wearer as that will kill the bacteria, anyways I know cheilitis is annoying but it can be cured quite easily too in fact. The best of luck to you.