A common misconception is that you can detect meth residue on walls by applying spray starch. It’s sometimes true.
- Spray starch will change color when it comes in contact with iodine.
- Some methods of making meth have used iodine, although other methods that don’t use iodine are popular.
- Starch does not react with meth nor any of the chemicals used in making it except iodine.
- You cannot detect residue left by smoking using starch.
- You cannot detect any of the chemicals that result from the process of making meth.
- The odds of detecting meth using spray starch are very small.