Heidi
As to my understanding, doing meditation is one of the ways to clear your -ve energy, and leaves you brighter and "cleaner" (look into mirror and you can see). However, where does the -ve energy go? -- may be around your house, if they are not cleared completely.
How about using some sea salt near you while you meditate, burn some incense, aroma oil, candles...., or smudge your house afterwards with some sage. Hope these will help to prevent demages.
How about using some sea salt near you while you meditate, burn some incense, aroma oil, candles...., or smudge your house afterwards with some sage. Hope these will help to prevent demages.