i would do the following steps:

1. you can kill fungi spores with alcohol. use medical alcohol and rub generously over affected areas. air house nicely!

2. ensure that either

a. you have a continous airflow (leave some windows open, enhance flow with a fan, always on) to move spores and reduce risk of new mold&fungus-growth.

b. you reduce humidity in the room below 65% (which discourages mold&fungus growth). this can be achieved through dehumidification; easiest is a to use an aircon and switch it to dry mode and leave it on. not sure if using dehumidifiers (the gel-like ones) is as good or cheaper. need to check for yourself.

good luck