A device or cleaning apparatus 10 which includes a telescoping shaft member 8 and a universal joint assembly 40 and which allows a user to easily and ergonomically clean or otherwise engage an angled or curved glass surface or another surface. If the preset frequency of the ventilator is set too high or too low from the spontaneous frequency, the patient will fall out of phase and \u201cfight\u201d the ventilator. 1 and Condition 1\u2267CA\u22670. At the second device, the input choices are entered. The scanning can be performed without knowledge or even precise control of the position of the object relative to the scanner.