My snake is about 4 yrs old and never had any health issues before. I noticed brown lines along his scales under his belly , the last 8-10 inches only, top half perfect . I bathed him as usual and thought it was dirt but it didn’t soak off. Did some research. Gave him 30 min diluted betadine bath, applied some neosporin. His enclosure was emptied, cleaned and disinfected and rinsed with hot water. Only has paper towels in there now until a shed. I want advice from some one here if there’s anything else I can do to be sure this doesn’t go further or if any of the research and things I’ve done will help. Thank you