The effectiveness of rat glue traps in catching rodents can vary depending on several factors. Here are some points to consider regarding their effectiveness and limitations:

1. Easy to Use: Rat glue traps are simple to set up and require no baiting making them user-friendly for homeowners and pest control professionals alike.

2. Non-Toxic: Unlike poison baits rat glue traps are non-toxic and do not pose a risk of secondary poisoning to pets or other wildlife.

3. No Snap Mechanism: Rat glue traps do not have a snap mechanism reducing the risk of injury to pets or curious children.

4. Trapping Multiple Rats: A single glue trap can catch multiple rats in one application increasing its efficiency.

Limitations:

1. Size Limitation: Rat glue traps may not be suitable for larger rats as they can sometimes escape or drag the trap with them due to their weight.

2. Inhumane: Critics argue that rat glue traps can cause suffering to trapped rodents leading to ethical concerns about their use.

3. Effectiveness with Some Species: Certain rat species may be more cautious and avoid rat glue traps making them less effective in some cases.

4. Limited Reusability: Once a rat is caught, the trap becomes unusable and new traps must be deployed, potentially adding to the overall cost.

5. Environmental Impact: Improper disposal of glue traps can raise environmental concerns due to the adhesive's persistence and potential harm to non-target species.

Rat glue trap can be effective for catching rats in specific situations but they also have limitations that should be considered when choosing a rodent control method. It is essential to weigh their advantages and disadvantages and, if used, to apply them responsibly and humanely.