You don't have to wash it every time you use it. Pour over brewers like the Clever don't need to be scrubbed down all the time since it takes a lot of brewing for coffee oils to build up. Occasionally wiping between the ridges with a soft sponge and some warm mildly soapy water should keep any coffee build-up from happening. Oh yeah, don't put it in the dishwasher. The Clever's crystal clear appearance will turn hazy from all the heat.
Clean the gasket if your Clever is dripping when it's not supposed to. The upper gasket, when removed, looks like a tire for a toy car. If you look closely at the upper, inside edge, you will notice a thin, little flange. This flange is the secret to the Clever Dripper's liquid stopping power. If your Clever is leaking, remove the gasket and take a good look. There might be a rogue coffee ground or some piece of who-knows-what stuck in there. Rinse it out under warm water. Don't use anything that would damage the thin silicone. If you end up with a damaged gasket (whether it it's your fault or not, email us at [email protected] and we'll send you a new set).
Use cleaners at your discretion. Some people use vinegar. Some people use lemon juice. Some people don't use anything at all (yuck). We think Oxiclean does a good job but someone on Youtube told us that it affects the taste of their coffee. If you decide to use a cleaner (yes, soap is a cleaner) be sure to give every edge and corner a thorough rinse to avoid adding a soapy flavor note to your coffee. In the video below, Tom explains some Clever cleaning basics. FYI, the opaque, black Clever was a test model from the manufacturer.