The smell of new shoes is usually glue and leather. If the smell of shoes is unpleasant and pungent and can't be dissipated for a long time, it is probably formaldehyde. In addition, you can also immerse your shoes in water to see if the water is green. If it turns green, it means it contains formaldehyde.
Under normal circumstances, new leather shoes have both a rubbery smell and a leathery smell, but the rubbery smell will disappear after wearing for a period of time, and the leathery smell will still exist, but it is lighter than when it was just bought.
Small coup to eliminate shoe odor
Usually, new leather shoes will smell like adhesive and leather. The smell of adhesive will fade after wearing for a period of time, while the smell of leather will still exist, but it will become a little lighter than when it was just bought. Generally, you only need to put some activated carbon in your shoes, or put some grapefruit skin in your shoes, which has a good deodorizing effect.
Mothballs are generally used to deodorize sneakers. Crushing mothballs, spreading the powder evenly in shoes and putting insoles on them can deodorize well, and also have a good bacteriostatic effect, which can kill a large number of bacteria bred by humidity and air tightness.