Dear Heidi, apologies for delay as the question did not pop up for me. We have new stock coming asap, but due to supply disruptions, we are anticipating July for arrival. In the interim, you can clean water gentle rinse your filter, and sun dry. Sniff test to see if there is odour. If there is you would normally order your next lot. Due to the delay, you have a few options. You can semiseal the filter by using foil to wrap it and lessen the odour that escapes the base. If you are using litter with carbon it it, such as our Premium Clay Clumping Litter, the carbon will help odour in globe and tray. If you have access to a wood fire, you can put charcoal in the tray, between liner and filter, as a temporary (messy) measure. We also have Litter-Robot spray cleaner that can be spritzed onto the filter to assist with odour. Apologies for being out of stock but we are working to restock asap!

yes, you can gently rinse the filter with clean water (no detergent) and sun dry. A sniff test will tell you if there is still odour when dry, and that's when you need to consider replacing.