If you can't get to a pet supply store, an adequate substitute can be made from equal parts of seltzer and white vinegar. In these cases, remove the padding and replace it. Environmental stress takes its toll on house cats. Cats are as individual as people. They slink from room to room and run from strangers.
Most cats thrive on the predictability of a daily routine.
Take the time to learn who your cat is and how you can meet his needs and minimize his stress. Whenever possible, insulate the sensitive cat from stressful events. Prepare the cat well in advance of a change in routine. Have the cat sitter come and feed the cat several times before you leave on vacation. Dealing with stressful situations can be more difficult than the retraining exercises.