Tile around Basement runs slow

My tile around my basement runs slow into my Sump Pump area, there is sand in the tile or dirt or something that is makeing it run slow.

The house is 34 years old and when it was built they used Plastic Feild Tile and I am going to say that they did not put stone around and on top of it, which means the sand went into the tile.

Is there any way to clean this drainage tile out without damageing the tile?

I live in Northwest Ohio.

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