Mouse powder.

I was watching the Price of Property on TV tonight, and there were a group of young Moslem Bangladeshi men in Manchester who had several buy to let flats that they owned. Their parents had started buying property in the early 70's, funded by - not mortgages - but cash borrowed from families and friends. Slowly paid back, in time they were able to buy another and another.
Mrs. Lear, when the presenter asked " Where did you get the money?" snorted, and said " From under the bed"
Which reminded me of a yellow powder I recently saw for sale in Romania.
" What's that for?" I asked Alin.
" It's for the mouses Mr. King."
" What mouses? I mean mice" We have the same problem with sheeps.
"The ones that are eating the money"
Alin finally made me understand that the powder was used the put on and around the money in the shoeboxes under the bed. Noone really believes the banks will give them back their own money, so they keep their money under the bed.Despite mice loving the taste of Romanian banknotes, they can't stand the yellow powder.
Simple really.