What did Bon Scott gargle with?

Excuse me, but I must inquire, could you perhaps elucidate on the curious matter of what precisely Bon Scott might have gargled with? I understand this query may seem unconventional, yet it stems from a genuine interest in the lesser-known aspects of his life and habits. Did he perhaps partake in some unconventional throat-clearing rituals, utilizing an exotic concoction or perhaps a more mundane solution? Your insights would be greatly appreciated.