" chemical sniffing " is most common among youth . they generally gain out of it once other drugs such as liquor and cannabis become scarce to them . seven - year - olds have been reported to start " grease sniffing " . because of the class issues surrounding to " grease sniffing " most snifters wait by 16 or 17 years , when they are heavily addicted .
Glue-sniffing is common among youngsters.