"And he did what was right in the sight of the LORD, according to all that his father David had done. In the first year of his reign, in the first month, he opened the doors of the house of the LORD and repaired them." (2 Chronicles 29:2-3)
"...Now sanctify yourselves, sanctify the house of the LORD God of your fathers, and carry out the rubbish from the holy place." (2 Chronicles 29:5)
In the beginning of his reign King Hezekiah did something differently that called God's attention, he began to do a cleaning in the temple of the Lord which had been abandoned, and repaired the doors of the Lord. He called the Levites and priests to consecrate and purify the temple of the Lord. Isn't that what we're doing these 21 days?
They put out all rubbish that was in the temple and afterwards they praised and worshipped with great joy. We are the spiritual Temple of the Holy Spirit, for that reason it's necessary to clean, throw out all rubbish, install an automatic cleaning system in our heart, and also clean exteriorly.
Take advantage of this fast after all, we've spent longer times without distractions... try not doing only an inner cleaning but, a physical one as well. Take these days to deep clean each room of your house, work, church (dedicate one day for each place) look for things you no longer use, if they're in good condition donate them, if not, throw them out... see if there's things you need to do, house repairs, work or church, that you're able to do: replace a light bulb, paint,sew, repairs, etc... friend, do them! Know that the Holy Spirit will be watching you, you will be doing something different that will call the attention of God and will influence others to do the same.
This week, since last Sunday, my husband and I began doing this in the church. We did a deep cleaning in every room in the church and it has been a blessing. People have see this and began helping as well, and not only that, they're doing the same in their houses :-)
After cleaning the interior and exterior, we will praise and say with great joy, "What a day!"
Note: Read and meditate on 2 Chronicles 29, it's very strong!