My house just finished renovation, the kitchen sink soap device, is the copper of the two-stage, there are two kinds of steel balls. But very strange is that I installed in the bottle of detergent (Li Bai Jiang juice the kind of), tried several times out of detergent. And then use other things to replace the detergent, including water, hand sanitizer, shampoo and even alcohol can be normal (jet) out, except for detergent can not, against the other, The water does not work (unless diluted to the same water). Ask Fangjia, how to solve?
I also encountered the same problem with you, the reason is very simple, the soap dispenser that press the tube out, the air inside the exhausted, and then resolved, you can smooth out the detergent.
