You can wash it with water but that must befollowed with some solvent and then light oil.

I use a potpourri device that works like a crock pot. It keeps the anti freeze at the proper temperature without a thermostat and they are cheap new.

$10 http://www.target.com/gp/detail.html/179-1099328-8786160?ASIN=B0002ONJ1G&AFID=Froogle&LNM=B 0002ONJ1G|Aroma_Electric_Ivy_Potpourri_Pot&ci_ src=14110944&ci_sku=B0002ONJ1G&ref=tgt_adv _XSG10001