Isolation Plus TX-167 for Sennheiser Memory Foam Earbud Tips

The best way to clean your foam earbuds is to use mild soap and warm water. You can also purchase memory foam earbud cleaning kits or packets from memoryfoamtips.com.

If you have really sweaty ears, alcohol-based hydrogen peroxide is the best choice for killing bacteria.

If your memory foam tips feel flat, don't worry – memory foam is a good thing! Here's how memory foam memory works:

Memory effect – or memory – is a phenomenon in which materials tend to recover from distortions induced by external forces after the removal of said force. 

In other words, memory foam ear tips will return to their normal shape once you let go after inserting them in your ear. This memory effect makes memory foam tips very comfortable because they adapt to the shape of your ear canal.