Our goal with this project is to test whether topical silver colloid is a feasible treatment option for patients with refractory CRS. With the recent publication of a proof of mechanism study6, the investigators are looking to extend the same notion into a proof of concept investigation. The investigators propose taking twenty volunteer patients with recalcitrant CRS and trial a course of daily intranasal silver colloid over a three-month period. Pre and post-treatment measurements will be taken using validated scoring systems for CRS patients14-16. These include the Sino-Nasal Outcome Test (SNOT-22)14, Lund-Kennedy score15 and the Smell Identification Test16, which examine quality of life indices, endoscopic assessments and sense of smell, respectively. Should the results of this preliminary study be in favor of silver colloid use in CRS patients the investigator should look into arranging a formal Randomized-Controlled Clinical Trial.