Thank you both for the replies.If the pest control doesn't effect the cures then I will go ahead and start dowsing again.I was also waiting for my dowsing sticks which now I have received.

One thing that came to my mind is what if I place intention on the stick like Marie said,this is for geopathic stress, then wrap the stick loosely with plastic wrap and then place it and say I have cured this geopathic stress.It will be protected from any kind of dirt.

I have to cure one geo stress line under the washing machine so I am thinking I will try that.