I am a bit disturbed about his accusations as my reputation is important to me and I have written to him to that effect.

So, I need to make sure this person is tidy, respectably quiet, and doesn't disturb other tenants much or destroy the place.

I decided to make an addendum to my lease that basically has them agree not to play the music too loud or at times that would be disturbing to neighbors.

WOW. i take it that in your lease there is a clause about not disturbing the peace of those around him?

I confronted her about her business and she said so long as she pay her rent on time and did not disturb my neighbor's peace it'll be alright.

Any damage to any such apparatus and the cost of clearing stopped plumbing resulting from misuse shall be borne by Tenant;(i)And Tenant's family and guests shall at all times maintain order in the Premises and at all places on the Premises, and shall not make or permit any loud or improper noises, or otherwise disturb other residents;(j)Keep all radios, television sets, stereos, phonographs, etc., turned down to a level of sound that does not annoy or interfere with other residents; (k)Deposit all trash, garbage, rubbish or refuse in the locations provided and shall not allow any trash, garbage, rubbish or refuse to be deposited or permitted to stand on the exterior of any building or within the common elements;(l)Abide by and be bound by any and all rules and regulations affecting the Premises or the common area which may be adopted or promulgated by the Condominium or Homeowners' Association having control over them.Furthermore, Tenant shall not attempt any repair without the Landlord’s express written consent.

OTOH, noise, disturbing the neighbors (a big police bust is a disturbance, right?)

Disturbing the insulation lowers the R value.

Disturbing.

To do that you go to settings-->calls and choose do not disturb.