Muc-Off Nano Tech Gel Concentrate Cleaner: 1L Bottle. The Bike Cleaner Concentrate in a handy refill pouch. Muc-Off's NanoTech cleaner in concentrate form. Each Bike Cleaner Concentrate pouch uses 89% less packaging than the equivalent 2 bottles of 1 liter Muc-Off Cleaner. So don’t chuck out your old Bike Cleaner bottle; save it and save the planet. The Bike Cleaner concentrate can also be used as a powerful degreaser in its concentrate form.