Let me explain this situation.
The guides could actually last around 2 days. The first time ZYX
put the guides @ CCK,Saturday, lasted for 2 days. This is because
over that weekend, I was in Johor. I didn't come home till
Sunday.When I was home Sunday night, I did not collect the guides,
instead, I collected the guides Monday Evening. 
Once, ZYX put it, it lasted for 5 hours.Why? Unfortunately, on that
day, SMRT was going around putting SMRT stickers over the SLRT
brochures. When SMRT saw SBST stuff, obviously, it would be thrown
away.That explains the situation. Guides @ CCK, AFAIK, can last for
2 1/2 days. 
