What does the Bible say about getting rid of bad spirits?

Don't be silly

Answer:

The Bible isn't a book of "magic spells," if that's what is being asked.

Regarding "protection" against "unclean spirits," however... the Bible provides the information that we need to know how to "fend off" this realm.

"For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms.

"Therefore put on the full Armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand.

"Stand firm then, with the Belt of Truth buckled around your waist [thy Word is Truth - John 17:17],

"with the Breastplate of Righteousness in place [all thy Commandments are Righteousness - Ps.119:172],

"and with your feet fitted with the readiness that comes from the Gospel of Peace [the Good News of the Kingdom of God - Mark 1:14-15 & Isa.52:7].

"In addition to this, take up the Shield of Faith with which you can extinguish all the flaming arrows of the evil one [the surety of our Hope and Certainty of God's Promises - Heb.11:1].

"Take the Helmet of Salvation [our Hope in Christ - I Thess.5:8-9],

"and the SWord of the Spirit, which is the Word of God [full circle back to the Word of God, the Bible; God's "twoedged sWord" - Heb.4:12. It is both the "offensive" and "defensive" Power of God.].

"And Pray in the Spirit on all accasions with all kinds of prayers and requests. With this in mind, be alert and always keep on praying for all the saints." (Eph.6:12-18 NIV)

Again... the Bible isn't a book of magic spells. But it reveals the "Divine Knowledge" we need in our ongoing struggle to stand, in Christ, successfully against the spirit realm.

The spirit realm is not the "entertainment" this world makes it out to be. It's not funny... it's not to be trifled with... and it's not to be deliberately sought out.

"...let all who take refuge in you be glad; let them ever sing for joy. Spread your PROTECTION over them, that those who Love your Name may rejoice in you." (Ps.5:11-12 NIV)