We have found two spiders in the last two visits.
You have only visited your house twice?
Otherwise, why do you only see them when they come?
And finally, are you positive they are brown recluse and not the brown recluse killer (spitting spider) which looks much the same except they do not have the tell tale dark brown violin shape on their back. They do have the same black knobs at the joints in their legs.
If you fear being bitten, you may want to contact Cliff Mackey at PO Box 123, Claremore, OK 74018. Phone: (918) 341-6715
I do not know where you live, but if you are in the Dallas area, Rid-All is the best pest control IMO. They will do a low impact treatment and are the environmentally friendliest that I know of.