With no Fuel Tank Screen and contaminated Fuel I would be worried the Fuel Lines would get Plugged.

I have owned my 82 Volvo Diesel since 1992 and my 84 Mercedes 300D for almost 5 years now and have never had the Fuel Tank Screens plug up on either of them or had any lost power due to plugged Filters.

The reason is that I buy 99% of my Fuel from the same station that Truckers told me back in the 1970s always had clean Fuel.

So the short story is that keeping the Fuel Tank Screen clean so it almost never needs to be removed is done by solving the Fuel Contamination Problem first.

So, what do you think is causing your Fuel contamination problem?
Do you think it is something growing in the Fuel Tank or you just got unlucky and go a contaminated batch of Fuel from a Station?

This is more complicated but you could remove the Screen and install a Shutoff Valve and install a separate Filter that Filters about the size of the Tank Screen down under the Car.
That would protect the Fue Lines from getting plugged up and make it a little easier to change the Filter there as you would not need to drain the Fuel Tank.

One of our Members carries a Funnel that has a Filter Screen in it and He stick that into the Tank when he fills up. I think He said he keeps it in a Bucket that has a Lid on it in the Trunck.
That would prevent particles but if there is an organisim in the Fuel I do not think the Funnel would keep the infection out of the Tank.

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84 300D, 82 Volvo 244Gl Diesel