Bad Ideas:

• Using a warm solvent for washing. This will dissolve your product and it will be lost forever
• Not securing your apparatus properly. Glassware will be broken and this will cost you BIG $$$$.
• Forgetting to use the filter adapters. The filter flask and funnel will not seal properly making this technique is no better than a gravity filtration.
• Not initially checking the aspirator for proper operation. If the aspirator doesn't work this technique is no better than a gravity filtration.
• Forgetting to empty the filter flask between filtrations. This mixes mother liquor from many, possibly incompatible steps. It is now impossible to use the mother liquor for rinsing.