eh,you didn't mention you were already doing this...and I didn't ask. Anything else you've tried?
A next step to consider is a hyssop rinse after the vinegar wash. Pour downward over the head and body, use downward strokes. Remember to Earth the residue and Pull up the infilling power
to project outward from the naval and to surround you. Really see the shield, feel it, hear it hum. Make it vibrant and change colors if you want. It's your shield. Instruct it and command protection.
Just so you're clear, it's three parts: wash/rinse, fill the void with power to shield, then seal it.
WASH with vinegar, & RINSE- Use a hyssop tea for the rinse, and what-the-heck drink a cup; and use hyssop oil or a strong hyssop brew to SEAL the base of the neck in the back of the head (that's a really vulnerable area), the crown of the head, third eye, and elbows to form a protective triangle. Draw an equal-arm cross for the four-ways as a seal with the hyssop at each of those points.
Alternatives to hyssop might be cedar or sage...don't drink a cuppa these, they taste awful. Plain hyssop can be purchased at the grocery store in herbal teas.