How would you eliminate chronic/recurrent fungal stent colonization in a patient with chronic hydronephrosis who is not eligible for reconstructive surgery due to medical comorbidity?

Need a CT scan to rule out a possible renal pelvis fungal ball. If the kidney is clear, then would remove the old stent and consider replacement with either a Resonance stent or a Boston Scientific Percuflex stent - would soak both in fluconazole prior to placement and also irrigate the kidney and b...