Originally Posted by
zip439
When bleeding the brakes keep the end of the tube you attach to the bleed nipple submerged in brake fluid in a container. It will prevent air from flowing back into the caliper.
Remember we are talking about this little tool being a one way valve, any air getting into the system will come from around the bleed valve threads, if so you have the valve open too much. You can stop any air leaks with grease if you still have air bleeding past the valve thread.