Isn't it interesting that after reading all the comments first - there is no clear and definite rule for mask usage.  You'd think there would be after all these months.  What does that say?

No to wearing a mask in car Or while on golf course. 

We use disposable masks and have on hand for clients.

I have 3 layer cloth masks that I wash after each use. I also have disposable ones. 

Disposable ones until they break.  I think this whole exercise is nonsense and am not wasting money on masks.

The washable masks get washed often enough to make me feel comfortable wearing them. As for the disposable masks, they get thrown away when I think it is time to do so. 

So...no arbitrary time for either.

My cloth masks I wash regularly.  The disposable ones I may wear once or twice before throwing.

I reuse mine quite often because I have a 99.97% chance of recovery with or without one. I also refuse to drive with one on or wear one outside.

I use a wonderful "space mask", which is three layers and washable.

I use disposable one for grocery store, it gets trashed after one use. I have a cloth one for in office and around my Mom who doesn't live with me. The 3 ply cotton cloth one is easy to wear all day and I have eight of them, wash after wearing, dry in sunshine. I try to give more than six feet. With 2000 people dying daily this is no joke

What mask. 

I have disposable ones I use and throw away 

I also have cloth masks that I wash after each use throw in hamper 

I have yet to replace one.  I tend to wear the same one most days, since most of my trips out to where they are required are short enough.

I have 2 fabric face masks, use them when I'm out shopping for food, wash them after a few uses. When I show homes, I have disposable ones, get tossed after each use. 

They are to be replaced after each outing!  We use hospital grade disposables but the cloth versions I've found, are not being used effectively.  Being extremely high risk, we don't mess around with alternative theories as we cannot take the risk.  Most opinions are coming from people who failed Grade 10 science class too :(

We have a large supply of cloth masks, they get washed often.

Will,

We wash them after every other  use and dry them outside in the sunshine and breeze. We are inside most of the time working, and the few times we are out amount to grocerry shopping (we are quick there are two of us) amd going out to lunch. (10 minutes away). A

I wash mine after 3 or 4 days. I have several masks so switching out every 3 or 4 days is easy. I have a supply of over 50 on hand, and keep some in each vehicle.

Same one all day .... 

I have a dozen bandannas, so every day!

We each have a few reusable ones that we wash after a couple of uses. When I use a disposable one I throw it away after a couple uses.

I think they have an expiration date because sometimes I'll wear one and it will have an awful smell sot I know it's time to change to a new one.

Hmm, I don't wear a mask very often, only when shopping for groceries.  I have reused my masks since the day that I got them.

Usually, until the elastic ear piece breaks and snaps and hits me in the cheek when I am taking off. Although, once since it was the only mask I had available, I skillfully ran the elastic piece back through the hole and tied a knot. It worked! 

My masks are all hand washable

Till it falls apart

disposable for when I'm out, one use and done  After I touch it to take it off I'm done with it.  I have cloth ones at my office that I  wear as needed and use a UV light between uses wash my before I remove it and wash after a day of use.  I always have a supply of both disposable and cloth ones available to me.

When the strap breaks on the disposable one.  Then I cut the straps to prevent it from strangling any form of wildlife.  The only thing the masks are doing is (1) creating fear in people (2) adding to landfills and (3) creating miserable death for wildlife that get their heads around the straps.

I use the disposable ones when needed. I throw it out agfter 1 long use or 2-3 short uses. You tend to know when it needs replacing. I am not wearing one outside, that is just crazy.  I do my best to stay away from people. In real estate the clients some times ar euncomfortable, so i have to make them comfortable, keeping a little distance but assuring them through out

We have washable masks that are replaced depending upon length of use. Probably replaced too often, but that is the way it goes

Mine is washable

We use surgical masks and my wife washes them periodically.  I reuse often.

We use cloth masks and wash them after each use.

I have several cloth masks I wash once a week. . .  I do have disposable masks for clients and a few in the car for just incase.

I had a friend sew a few double layered ones for me. I wash withem in hot soapy water, spray them with a disinfectant and reuse. I do have the medical style ones as well though. 

Not keeping count 

Wearing a mask can cause problems,

So I tested to see when wearing a mask STARTS causing me a problem. 
First symptom is coughing.  Exactly the worst benefit of wearing a mask.
So when I start coughing, I replace the single use mask.
When the full test was executed it took 3 days to recover my stamina and full breathing capacity, and I not ill or in possession of a pre-existing condition....well maybe one.