Truth isn't a dish best served cold, Coming at a fellow member under the newbie sub section like that is a dick move and responses like that from members like you are the main reason new members never come back, Maybe try decaf next time .
As for optimal drying conditions, 60f is on the lower end of good temps, it ranges from 60-75f . Humidity is from 55% to 60% . So once again.... there isn't some exact number that creates wonderbud, there is a range of rh and temperature ... and even if the OP had the drying temp and RH in the optimal range does not mean he wouldn't get mold had it already gotten a foothold during growing.
I agree with you that they should do a little research before next run as it'd save this from happening again , Maybe ...