Hey Yinmui, thanks for your post! I would recommend rosining your bow more often as having very little rosin can limit ability to grab the strings efficiently. I think your problem might be putting too much rosin on your bow when you apply it. I recommend a light coat every 2-4 practice sessions, which can be tested by taking the back of your finger and swiping the bottom part of the hair. If your finger is totally white, then you have too much rosin. If you don’t have barely anything on your finger, then you need more rosin. Somewhere in between is ideal!
Check out this video which shows the process of testing out your bow for rosin.