Hey @gargi I also faced the same issue earlier but now I know a bit to deal with this.

1st of all if your SP goes below 50% then stop commenting or voting for a while and wait till it reach 75% at least. Because your voting power will not be more effective if it's below 50% as far as I know.

I’m using Partiko app to interact on Steemit. You should as well! Here’s my invite link:
https://partiko.app/referral/bloggerkrunal

You will get 3000 Partiko Points for sign up bonus by my invite link, and you can exchange them into Steem token! You can get points for posting, commenting, up voting. Inshort for every action you do on Steemit it will give you points.

More points means more steem and more interactions on Steemit.
If you download and use the app directly instead of the referral link then you will only get 1000 Points.

I hope this can help you keep rolling. :)

Posted using Partiko Android