Personally, I don't use them, but if you wanted to make a protection mix to place by your door or as a decorative something on a table [or at least it appears like it] take a mix of pink salt, sea salt and sand then add to it lavender, rosemary, dried orange slices and a couple of cinnamon sticks. it'll look pretty, smell nice, and provide plenty of good vibes for your house.
I will give you great recipe, i hope you are okay with ancient Christian practices and working with angelic forces :D
obtain holy water from orthodox monastery or church, frankincense, bouquetof basil, and little coals for burning (you can buythose in any orthodox church or monastery)
take a jar, pour holy water in it, and add frankincense inthe water and let it rest for at least a day. when day has passed, filter it out, pour watertothe crystal bowl and dry out residue from frankincenseon a piece of paper. when frankincense is dry, light up coals in your incense burner or in some metal cup you have, put frankincense on coals and go counterclockwise in your house while reading psalm 91 making sign of cross at every corner. later when all coal burned out pourthose ashes intothe crystal bowl with holy water. use bouquet of basilto sprinkle little bit of water in four directions and read psalm 91 again. and lastly drinkthree drops ofthat water and read psalm 91 thirdtime...
then readthis prayer:
A Prayer to Archangel Michael, the Mighty Warrior
O Lord God, Great and Eternal King!
Send, O Lord, Thy Archangel Michael to help Thy servant (name), and to deliver me from all my enemies, visible and invisible.
O Archangel Michael, angel of the Lord and vanquisher of demons! Suppress all my combatants, make them meek as sheep, and disperse them like dust before the wind.
O great Michael, Archangel of the Lord, six-winged high prince, leader of the heavenly host, the Cherubim and the Seraphim! O kind Archangel Michael, be my helper in all offenses, sorrows and woes, in the desert, at the crossroads, be a safe haven on rivers and seas. Deliver me, O great Archangel Michael, from all the temptations of the demons, when they hear me, thy sinful servant (name), praying to thee, and calling upon thee, and entreating thy holy name: hasten to assist me and heed my prayer.
O great Archangel Michael! Vanquish all my opponents by the power of the Holy and Life-giving Heavenly Cross of the Lord, by the prayers of the Most-holy Theotokos and the holy apostles, the holy prophet of God Elias, saint Nicholas the wonderworker, saint Andrew the fool-for-Christ, the holy great martyrs Nikitas and Eustace, the venerable fathers and holy hierarchs, martyrs, and all the heavenly host. Amen.
Bowl will function as protection as well astrap for negative energies and entities, it will also look and smell very nice, you can keep it at the entrance door, or in your room, or wherever you like. If itcaughtsomething, water will change accordingtothe energies itcaught...greenish or yellowish, or something third...buti can say thatin my house i have bottles of holy water for years and they are crystal clear and i drink from them from timetotime...i have few from Israel, from mountAthos, Ostrog etc...
Anyways, if water gets spoiled simplytake it out and pour below your favouritetree making sign of cross.thatsthe right wayto do it