Want this question answered?
Not often if there tarting to wear and tear you should replace them.
to eat
There is no definite time that you need to replace a convertible top. If it is properly maintained then it can last for many years.
when its empty
Nectar
They need replaced when they wear out.
Because they don't need animals to polinate. If they make nectar or have bright colours and strong scents, it will be an animal-polinated flower. So they don't need to make nectar or have bright colour
When your tires have 2/32" tread depth left you need to replace them.
No set time...just at failure
In order to extract nectar from a flower you will need to use a small tube device that has a suction feature. You will suction the nectar out using the tube.
Depending how often and how long you use it, you would need a new belt about once a year.
I never replace it ,only if you need to like before a smog test so it can pass emissions