ALWAYS USED TABLE SALT,JUST CHANGE EVERY FEW WEEKS,WORKS FINE.
------------- its easy enough to be pleasant when the world rolls along like a song.but a man is worth while if he can smile when every thing goes f------ wrong.
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Three cat litter trays filled with cheap common salt, and left on the floor of the caravan including the floor of the bathroom.
When the salt becomes solid, take them into the house and dry them off in the airing cupboard to recharge them then use them again.
We have been using this method for many years and it's never failed yet. Also good for using around the house in conservatories and single glazed window bottoms.
Julia
------------- Just love to be out amoungst Nature and Wildlife
Celebrating 37 years of Caravanning in 2019, Recently Considered Retiring, but Totally Addicted for Life!