My other thought is that some medications have short term memory problems as a side effect. Is your brother on any medications ? If her is, he could go to www.drugs.com , type in the name of the drug and see if memory issues are a side effect. Finally, is your brother having sleeping problems ?
For some vehicles, you're advised to change the coolant every 30,000 miles. For others, changing the coolant isn't even on the maintenance schedule. For example, Hyundai says the coolant (what many refer to as antifreeze) in most of its models should be replaced after the first 60,000 miles, then every 30,000 miles after that. The interval is every 30,000 miles on some Mercedes-Benz models, but on others it's 120,000 miles or 12 years.
Report Abuse. 1  Change filters regularly. Nasal Cannula should be replaced monthly. 2  No longer than 24 hours before changing. My dad had a rare form of asthma for 15 years and was on oxygen. 3  we told patients to change them every week and rinse them daily. Tubing should be changed every month OR when cinks develop. humidiifier bottle, if you have one should be filled twice daily and washed every few days.