I used to dip my doos in duramitex,the old style recipe with good results.the doos would smell of it for months but it really kept them vermin free.you had to pick a good day to do it as they were out of action for hours and took a few weeks to regain the complete waterproofing they had prior to the dipping.but since then duramitex has changed,so can anybody recommend something that will do the job.i tried a product called ambush but was not happy with the results. any thoughts on the subject.