catch cockroaches the sticky way

it came almost as a surprise . a small sticky board
of say 10" x 4" costing about thirty rupees. one side
is coated with some sort of a sticky gum. keep the
board where you expect lizards, cockroaches etc
during the night. next morning lo and behold. lizards
and cockroaches  are stuck on the board. a few more
 next morning .  and again the day after.
unbelievable but we have  seen it in action.
the secret is probably the extra sticky gum which
doesnt dry up even after days of exposure.
product comes by the name TROUBLE GUM.