In order for a strong pressure build-up to be created within the capsule, the sticker lids are designed to be fastened as securely as possible. The food-safe glue needs to be strong for the product to perform well, however sticky residue isn't something that you should need to contend with every time you brew!
How to remove sticky residue from the rim of a SealPod capsule: After brewing, always slide your fingernail underneath the sticker lid and the aluminium/glue residue ring should all come off in one piece. If a glue ring remains on the capsule after you've removed the lid, try picking at its edge and, again, attempt to peel it away in one go. Ideally, you should be achieving a clean capsule surface before proceeding to rinse/scrub your pods.
If you are finding that the residue cannot be peeled away at this point, the best thing to do from here will be to start afresh - thoroughly clean the surface of the stainless steel before trying to apply sticker lids again. In order to remove the residue build-up, you might want to apply a solvent (such as cooking oil, peanut butter or isopropyl alcohol) onto the sticky surface. Let it sit for a few minutes to loosen it and then gently rub the area to remove the residue. Then wash the capsule with soapy water. Once you've achieved a nice clean surface, try recreating your capsule as normal.