Delete tweets programmatically. You need to install pip install tweepy.

remove_tweets.py

#!/usr/bin/python

from __future__ import print_function
import tweepy
import itertools
import datetime

# OAuth application
consumer_key = "<<CONSUMER_KEY>>"
consumer_secret = "<<CONSUMER_SECRET>>"
# OAuth account
access_token = "<<ACCESS_TOKEN>>"
access_token_secret = "<<ACCESS_TOKEN_SECRET>>"

# Delete tweets older than this ID
max_id = 807213779268358144
dry_run = False

# in case you want to filter status by dates
startDate = datetime.datetime(2016, 1, 1, 0, 0, 0)
endDate = datetime.datetime(2016, 12, 31, 0, 0, 0)

# authentication
auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_token, access_token_secret)

api = tweepy.API(auth)

screen_name = api.verify_credentials().screen_name

def get_statuses_by_dates():
	tweets = []
	tmpTweets = tweepy.Cursor(api.user_timeline).items()
	for tweet in tmpTweets:
		if tweet.created_at >= startDate and tweet.created_at <= endDate:
			tweets.append(tweet)

	return tweets
        
def get_statuses_by_max_id():
	return tweepy.Cursor(api.user_timeline, max_id = max_id).items()

def print_status(tweet):
    print("Deleted: ", tweet.id, " - Date: ", tweet.created_at, " - ", tweet.text.encode('utf8'))
    
def delete_status(tweet):
	try:
		if dry_run == False:
			api.destroy_status(tweet.id)
		print_status(tweet)
	except:
		print("Failed to delete: ", tweet.id)


print("Deleting tweets for: @", screen_name)
for status in get_statuses_by_dates():
    delete_status(status)