Sink life clever trick ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsir-valves.com
Generally encountered such a phenomenon, you can first make a judgment, that is, whether it has to save, there has been a trend of expansion has always been, and if so, then advise you to shovel it out as soon as possible, and then put a layer of glass glue can be; If it is in good condition, then you can try the following method. 
First, look for liquid soap at home to find if there is no need for a toothbrush, dipped in a little liquid detergent, the use of the most primitive method - scrub moldy darkened, although very unusual, but the effect is certainly much better than the rag wipe, is a little bit laborious; If you are bothered with this, then you can go on to the next method. 
Second, 84 disinfectant to take a paper towel, try to tear the size of the black edge, take a little 84 disinfectant, and then directly paste in the moldy place can be, oh, the next is to wait quietly, generally takes 24 hours, although time It's a bit long, but after all, it's simple, no trouble, and it's lazy! Highly recommended! ! 
Under normal circumstances, after 24 hours, there will be significant changes, glass plastic will return to the original color; if it is still no effect, then you can only regret to tell you that must be shoveled out, hit the rubber slightly!
Grows in the kitchen sink Can't stand the coup!
As a family cook who loves cooking, the most hated thing to see is the kitchen sink! There is a special influence on the mood, it does not matter, today Xiaobian teach you a wonderful way to easily solve the trouble!