I am currently taking an acrylic nail course. I don't have much confidence in my instructor tho and am horrified at what I've done. I don't know what I did so wrong for this to happen. I did her nails about a month ago and last week went back to fill them. Today I get a text that her nails are discoloured so I went to her house to remove them and this is what I found. What could I have done wrong? My tools were sterilized. I used a new file and buffer on her. I spray alcohol after every step I do. I wear gloves. I get her to wash her hands at least twice throughout the process. What could have happened? Are some people prone to fungus no matter how careful you are or is this definitely something I did to her? Can powder, acrylic brushes or cuticle oil become contaminated?