Dear Censors of Shoe Care!, I am writing to ask for help with a rough patch that's cropped up in my shoe-care routine. I brush my shoes regularly, and every five wearings I do this: I apply Renovateur; let the shoe sit for a few hours; then apply a coat of Saphir's shea-butter cream of the same colour or neutral, and let the shoe sit for a day; then finish with a coat of wax all over the shoe, bulling on the toe, and some cream on the vamp to prevent creasing. (Between most steps above, I brush with a horsehair brush to make even the distribution of stuff on the shoe.) This has served me well for years, only today, many of the pairs that were waiting for their coat of wax developed dry, rougher patches on the toe when I tried to bull it. Here is a pair of Lattzanis that show this: There was some whitish residue---which I took to be old wax---in the rough area, so I applied renovateur again on the area, then cream, then tried to wax, but the patch remains. What do you think is causing this? And would you propose I do? Thanks in advance for any suggestions! Perhaps one useful piece of evidence is this: the weather has been very humid in Cambridge in the last few days, and it's turned very, very suddenly hot two nights ago.