Police had been closely watching the East Tamaki and Bairds Rd intersection, and would now issue summonses and trespass notices "when appropriate" in a bid to help ease public concern.
"Neighbourhood police teams already allow police to deploy dedicated community staff to the area every day in an effort to move window washers along and deal with any offences that they come across, but these new measures will offer more deterrence and make it difficult for them to carry out their tasks," Mr Phillips said.
"While the initiative is only in its early stages, we are starting to see some good results. If it's successful, it will likely be rolled out in other problem areas."
Police have also carried out a youth workshop aimed at preventing window washing activity in the long term.
"The purpose of the workshop was to bring together a number of agencies to assist the youths in finding alternative employment or education," Mr Phillips said.
"We want to encourage them to find more appropriate and sustainable forms of employment."
Enforcement can only provide part of the solution, he said.
"The workshop was a real success. We spoke with a range of youths, some as young as 14. It was a great opportunity to engage with these young people in a positive way."
An existing Auckland Council bylaw makes window washing unlawful if it is deemed to be unsafe, intimidating, causing nuisance or obstructing traffic. The bylaw is enforced by the council, with police providing a support role.
Max Wilde, manager of bylaws and compliance at Auckland Council, said: "Council continues to take prosecution action where possible against repeat offenders in a bid to encourage alternative employment."
The public was urged to not to encourage the window washers by giving them money, and were instead asked to call 111 if they witness or experience any aggressive or dangerous behaviour from any person at an intersection. Anybody who feels uncomfortable with having window washers approach their car is advised to keep their windows up and doors locked and make it clear that you do not wish to have your window washed.