Dutch to English Tech/Engineering Manufacturing Service and Maintance Manual

Hi all,

Busy with what is supposed to be general terms and conditions for a firm selling water purification systems but there is a small file included which is actually a service and maintenance manual. Bit technical in places but have most of it under control. However need some assistance with "dichtslippen" in this context:

"Gebruik enkel originele filters. Andere filters kunnen het dichtslippen van membranen veroorsaak.

Only use original filters. Other filters can cause membranes to xxxx ??

Probably very easy but can't get my head around it right now.

TIA
Debbie