Pre-smartphone this was so me. At one point in time I’m pretty sure I could have recited the back of the Pantene Pro-V bottle.

DMDM Hydantoin is my shit

When i was young the daily newspaper (which used to be like a daily updated news website printed out on large sheets of paper, for our younger readers) was always letting in the toilet. Bonus was that you had a fallback when the loo paper ran out.